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Oracle sql Interview Question : How to change rows to column
 
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This video tutorial talks about the frequently asked oracle sql interview question of changing rows to the column. Based on the given scenario, we are asked to change the presentation of data in a table with 3 rows and 2 column to 3 columns and 2 rows. Decode Function in oracle https://youtu.be/YUAjPMjqMws Pivot and unpivot in oracle https://youtu.be/6s0DI1YcWIM
Views: 17146 Kishan Mashru
How to add serial no column in oracle report easy way
 
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We need serial no. column in every time. I have tried to show the process in very easy way.. I think, it is very useful. try it. music is downloaded from camtasia studio library. My Youtube Channel : https://www.youtube.com/c/MukulAhmed420 My Facebook Account: https://www.facebook.com/mukul.ahmed.148 My Google+ Account : https://plus.google.com/u/0/+MukulAhmed420 My Twitter Account : https://twitter.com/mukul_420 My Linkedin Account: https://www.linkedin.com/in/mukul-ahmed-737844b1?trk=nav_responsive_tab_profile My hi5 Account : http://www.hi5.com/profile.html?uid=6022709819 My okcupid Account : https://www.okcupid.com/profile/mukul_420
Views: 709 Mukul Ahmed
Oracle SQL Tutorial 13 - How to Add Column Constraints (Attributes)
 
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So far, we have this table declaration: CREATE TABLE users( user_id NUMBER, username VARCHAR(50 CHAR) first_name VARCHAR2(50 CHAR), last_name VARCHAR2(50 CHAR) ) We can run this command see that it works. As we are learning though, we are going to want to be able to recreate our table with different settings and such, but if you try to run this command, it will complain that the table already exists. So we first need to delete this table before we start editing settings. When we get more experienced, we will learn about ways to edit the structure of a table that already exists. To fix this, we can get rid of the table using the DROP TABLE command: DROP TABLE users You can run this every time if you need to practice by adding a semicolon after it. This is how you can tell Oracle that you are putting in another command after it. This is known as a delimiter. When you run the script, it is going to run both commands. Now we can go through and reconsider our table structure. This is fine for starting out because we don't have any important data in our database, but once your database is in production you are not going to want to just drop tables. In the last video we discussed different constraints that you can apply to columns in a database table, but how do you actually apply these when you are creating a table? The first way you define constraints is to put them right after the column in your CREATE TABLE statement. CREATE TABLE users( username VARCHAR2(50 CHAR) NOT NULL ) When we define constraints this way, we usually say we are adding column attributes. If you have two constraints you want to add, you just put one after the other with spaces in between. There is no particular order that is required. CREATE TABLE users( username VARCHAR2(50 CHAR) NOT NULL UNIQUE ) In this situation we have already given the column the NOT NULL and UNIQUE attributes, so we should consider making this a primary key: CREATE TABLE users( username VARCHAR2(50 CHAR) PRIMARY KEY ) As you can see, adding column attributes is super easy. We can add a default like this: CREATE TABLE users( username VARCHAR2(50 CHAR) PRIMARY KEY, account_balance NUMBER DEFAULT 0 ) Note that now we need the comma after the first row. There are a few constraints we did not talk go through an example, specifically foreign keys and check constraints. We will be adding these constraints to our database in future videos. In the mean time, I have a thought for you… Many people prefer to name their column constraints. That way, we can refer to certain constraints by name. For example, we might have a primary key constraint that could be named users_pk. The way we are creating these constraints does not allow for this feature, so in the next video we are going to be discussing different ways to create constraints. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support me on Patreon! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 22727 Caleb Curry
PL-SQL tutorial 16 - How to calculate sum of sal column
 
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Hello friends today i'm going to explain to you how to calculate total sum of sal column using deptno Oracle database Unbeatable,Unbreakable Platform..
Views: 1985 Oracle World
PL/SQL tutorial 15: DML Trigger With Before Insert, Update and Delete DML Examples
 
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PL/SQL Tutorial 15 explaining DML Trigger with examples such as Before Insert, Update and Delete in Detail. ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog : http://bit.ly/dml-triggers Previous Tutorial ► Trigger Intro : https://youtu.be/R3fvX_xf5P4 ► SELECT-INTO : https://youtu.be/F5eMJhwmCQs ►IF-THEN-ELSIF: https://youtu.be/aW9XgUHSr0I ------------------------------------------------------------------------- ►►►Let's Get Free Uber Cab◄◄◄ Use Referral Code UberRebellionRider and get $20 free for your first ride. ------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider https://www.facebook.com/imthebhardwaj http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ http://rebellionrider.tumblr.com/ http://www.pinterest.com/rebellionrider/ You can also Email me at for E-mail address please check About section Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 108311 Manish Sharma
SQL 12c  Tutorial 19 : SQL  IDENTITY Column for generating Sequence Values by default
 
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SQL 12c Tutorial 19 : SQL IDENTITY Column for generating Sequence Values by default SQL 12c Tutorial for beginners Oracle SQL 12c Tutorial for beginners SQL 12c New Features Identity columns
Views: 1063 TechLake
05-Oracle SQL Arabic Course - Null Value & Column Aliases -اوراكل ديفلوبر
 
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الدرس الخامس من سلسلة دروس تعلم أوراكل محتويات الدرس: 1- NULL Values. 2- Null values in Arithmetic Expressions. 3- Column Alias. .......................................­.................... تواصل معانا علي الفيس بوك من هنا : https://www.facebook.com/askgad .......................................­.................... تواصل معانا علي موقعنا من هنا : https://www.askgad.com/
Views: 4685 Ask Gad
Oracle tutorial : Pseudo columns in Oracle PL SQL (pseudo column)
 
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Oracle tutorial : Pseudo columns in Oracle PL SQL ( pseudocolumn ) oracle tutorial for beginners rownum in oracle This video will show you what is Pseudo columns in Oracle PL SQL. Pseudo columns are likes ROWNUM, ROENUM, ROWID, NEXTVAL,SYSDTAE , USER etc. pseudocolumn examples Oracle tutorial : Pseudo columns in oracle Oracle supports several special-purpose data elements that are not actually contained in a table, but are available for use in SQL statements. Here is a partial list of pseudo-columns in Oracle a)CURRVAL : When using Oracle SEQUENCE values, the pseudo-column CURRVAL returns the current value of the sequence. for example: schema.sequence_name.CURRVAL b)NEXTVAL :When using Oracle SEQUENCE values, the pseudo-column NEXTVAL returns the next value of the sequence and causes the sequence to increment by one. for example: schema.sequence_name.NEXTVAL c)ROWNUM:ROWNUM returns a number indicating the order in which a row was selected from a table. d)ROWID: ROWID returns the rowid (binary address) of a row in a database table. e)USER :This pseudo-column will always contain the Oracle username under which you are connected to the database. f)SYSDATE:This pseudo-column will contain the current date and time. This column is a standard Oracle DATE datatype. The value represents the current time on the server not the client. For more tutorial please visit #techquerypond https://techquerypond.com https://techquerypond.wordpress.com https://twitter.com/techquerypond
Views: 1536 Tech Query Pond
SQL: pseudo columns (Rowid/Rownum)
 
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In this tutorial, u'll learn the difference between rowid & rownum..
Views: 31641 radhikaravikumar
SQL:Column name starting with digit
 
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In this tutorial, you'll learn how to use column name starting with digit or underscore. PL/SQL (Procedural Language/Structured Query Language) is Oracle Corporation's procedural extension for SQL and the Oracle relational database. PL/SQL is available in Oracle Database (since version 7), TimesTen in-memory database (since version 11.2.1), and IBM DB2 (since version 9.7).[1] Oracle Corporation usually extends PL/SQL functionality with each successive release of the Oracle Database. PL/SQL includes procedural language elements such as conditions and loops. It allows declaration of constants and variables, procedures and functions, types and variables of those types, and triggers. It can handle exceptions (runtime errors). Arrays are supported involving the use of PL/SQL collections. Implementations from version 8 of Oracle Database onwards have included features associated with object-orientation. One can create PL/SQL units such as procedures, functions, packages, types, and triggers, which are stored in the database for reuse by applications that use any of the Oracle Database programmatic interfaces. PL/SQL works analogously to the embedded procedural languages associated with other relational databases. For example, Sybase ASE and Microsoft SQL Server have Transact-SQL, PostgreSQL has PL/pgSQL (which emulates PL/SQL to an extent), and IBM DB2 includes SQL Procedural Language,[2] which conforms to the ISO SQL’s SQL/PSM standard. The designers of PL/SQL modeled its syntax on that of Ada. Both Ada and PL/SQL have Pascal as a common ancestor, and so PL/SQL also resembles Pascal in several aspects. However, the structure of a PL/SQL package does not resemble the basic Object Pascal program structure as implemented by a Borland Delphi or Free Pascal unit. Programmers can define public and private global data-types, constants and static variables in a PL/SQL package.[3] PL/SQL also allows for the definition of classes and instantiating these as objects in PL/SQL code. This resembles usage in object-oriented programming languages like Object Pascal, C++ and Java. PL/SQL refers to a class as an "Abstract Data Type" (ADT) or "User Defined Type" (UDT), and defines it as an Oracle SQL data-type as opposed to a PL/SQL user-defined type, allowing its use in both the Oracle SQL Engine and the Oracle PL/SQL engine. The constructor and methods of an Abstract Data Type are written in PL/SQL. The resulting Abstract Data Type can operate as an object class in PL/SQL. Such objects can also persist as column values in Oracle database tables. PL/SQL is fundamentally distinct from Transact-SQL, despite superficial similarities. Porting code from one to the other usually involves non-trivial work, not only due to the differences in the feature sets of the two languages,[4] but also due to the very significant differences in the way Oracle and SQL Server deal with concurrency and locking. There are software tools available that claim to facilitate porting including Oracle Translation Scratch Editor,[5] CEITON MSSQL/Oracle Compiler [6] and SwisSQL.[7] The StepSqlite product is a PL/SQL compiler for the popular small database SQLite. PL/SQL Program Unit A PL/SQL program unit is one of the following: PL/SQL anonymous block, procedure, function, package specification, package body, trigger, type specification, type body, library. Program units are the PL/SQL source code that is compiled, developed and ultimately executed on the database. The basic unit of a PL/SQL source program is the block, which groups together related declarations and statements. A PL/SQL block is defined by the keywords DECLARE, BEGIN, EXCEPTION, and END. These keywords divide the block into a declarative part, an executable part, and an exception-handling part. The declaration section is optional and may be used to define and initialize constants and variables. If a variable is not initialized then it defaults to NULL value. The optional exception-handling part is used to handle run time errors. Only the executable part is required. A block can have a label. Package Packages are groups of conceptually linked functions, procedures, variables, PL/SQL table and record TYPE statements, constants, cursors etc. The use of packages promotes re-use of code. Packages are composed of the package specification and an optional package body. The specification is the interface to the application; it declares the types, variables, constants, exceptions, cursors, and subprograms available. The body fully defines cursors and subprograms, and so implements the specification. Two advantages of packages are: Modular approach, encapsulation/hiding of business logic, security, performance improvement, re-usability. They support object-oriented programming features like function overloading and encapsulation. Using package variables one can declare session level (scoped) variables, since variables declared in the package specification have a session scope.
Views: 1845 radhikaravikumar
ROWID VS ROWNUM IN ORACLE
 
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This Video explains the difference between ROWID and ROWNUM using real project examples. ROWID provides the unique physical address where the row is being stored. ROWNUM indicates the order in which the data was returned from the select query.
Views: 3398 Tech Coach
Oracle Apps Tutorial-19:Forms Personalization
 
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Oracle Corporation, Enterprise Resource Planning, ERP, R12 User Creation, Oracle E-Business Suite (Business Operation), Oracle Database (Software), Oracle Training, Oracle E-Business Suite R12, Learning Oracle, Creating a User in Oracle, Oracle Tutorial, Oracle Financials ledgers, chart of account structure, balancing segment values (BSV), legal entities, MOAC, operating unit, R12, 11i, oracle, scm, apps, functional, purchasing, order management, discrete manufacturing, training, online, placement, certifications
Views: 29718 DataWarehouse
ORACLE SQL AND PL/SQL INTERVIEW QUESTION : DIFFERENCE BETWEEN ROWID AND ROWNUM WITH EXAMPLE
 
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In this video tutorial, we discuss the pseudo column rowid and rownum in oracle sql. After watching this video you would be able to understand the basic difference between rowid and a rownum pseudo columns of oracle database. Rowid returns the exact location of the row in the database, hence whenever you retrive a record based on rowid, it is the fastest retrival possible. Whereas for each row returned by a query, the ROWNUM pseudocolumn returns a number indicating the order in which Oracle selects the row from a table or set of joined rows. For more such videos visit out complete list of videos on www.youtube.com/c/kishanmashru Visit or blog www.oracleplsqlblog.com
Views: 1922 Kishan Mashru
add new column in oracle forms 10g | Ten Minute Code
 
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add new column in oracle forms builder 10g 1. Create table CREATE TABLE add_column (id NUMBER, Name VARCHAR2(20)); 2. Create forms 3. Add new column sql*plus ALTER TABLE add_column ADD gender VARCHAR2(10); 4. Go to form 5. Go to data block wizard table refreshapply 6. Frame select go to Layout wizard data blockapply
Views: 2126 Together Oracle
HOW TO RETURN MULTIPLE VALUES FROM A PROCEDURE IN ORACLE PL/SQL? (USING OUT PARAMETERS)
 
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This video tutorial explains how an oracle procedure can return multiple values with a proper example. The video tutorial shows how this problem can be tacked using simple and easy to understand out parameters!!!
Views: 14065 Kishan Mashru
SQL Lesson 32, How to calculate percentage on a particular column
 
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calculating percentages in SQL
Views: 11430 hammadshams
33. Column Format in Oracle
 
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In this video you will learn about Column Formatting. I will show you how we can format the numeric column to use comma (,) to separate thousand etc. I will also show you how we can trunc string to show first 3 words etc. For Support =========== Email: [email protected] Contact Form: http://www.learninhindi.com/home/contact Our Social Media ================ Facebook: https://www.facebook.com/LearnInHindi Twitter: https://twitter.com/LearnInHindi For Training & Videos ===================== For more videos and articles visit: http://www.learninhindi.com Free Java Programming In Hindi Course ===================================== https://www.youtube.com/playlist?list=PLOZ3jentlCDAwwhMyoLISrxkXTADGp7PH Free Oracle PL/SQL Programming In Hindi Course ============================================== https://www.youtube.com/playlist?list=PLB5DA82419C2D99B6 Free C Programming In Hindi Course ================================== https://www.youtube.com/playlist?list=PLOZ3jentlCDAxKpBLMWogxSdy6BZcsAJq Trips & Tricks Channel ====================== https://www.youtube.com/channel/UCGmLfkuCo-3lHHJXRJ9HUMw Programming in Hindi Channel ============================ https://www.youtube.com/channel/UCudElIDgwNrybeAvXIy1HZQ
Views: 16526 ITORIAN
Oracle Pseudo Column, Virtual Column , Invisible Column and Unused Column
 
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More Details at, Pseudo Column @ https://www.youtube.com/edit?o=U&video_id=GIGmZwShGh4 Virtual Column @ https://www.youtube.com/edit?o=U&video_id=qUALFDzLDJw Invisible Column @ https://www.youtube.com/edit?o=U&video_id=nz48CdgDCt4 Unused Column @ https://www.youtube.com/edit?o=U&video_id=GWo4VcNZo6Y
Views: 221 Siva Academy
Oracle SQL Tutorial 14 - Column-Level and Table-Level Constraints
 
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In the previous video we talked about adding constraints at the column-level. We made it nice and simple by only requiring a few keywords, but the problem we were having is that we could not assign a name to the constraint, which many people like to do so we can reference easily if we need to at a later time. To do this, it requires a little bit more typing, but it will give us extra flexibility and many consider it to be the higher quality approach to adding constraints. Let's go though a simple example. Let's say we have a users table with a user_id column that we want to make a primary key. We will create the table like this: CREATE TABLE( user_ id NUMBER PRIMARY KEY ) Instead of adding the PRIMARY KEY keywords after the data type, we add: CONSTRAINT user_pk PRIMARY KEY Now, we have assigned the name user_pk to this constraint. You can do the same with other constraints, such as UNIQUE. The syntax would be CONSTRAINT username_un UNIQUE. The other way to create constraints requires to put all of our constraints at the bottom of our table creation rather than inline with the column. This type of constraint is known as a table-level constraints. To make a column a primary key using table-level constraints, we add it to the CREATE TABLE command as if it is another row and use the CONSTRAINT keyword to tell Oracle that what is coming is a constraint, not a column in our table. CREATE TABLE users( user_id NUMBER, username VARCHAR2(50 CHAR), CONSTRAINT username_un UNIQUE (username), CONSTRAINT users_pk PRIMARY KEY (user_id) ) The primary differences here is that you have to put the column you are talking about in parenthesis after the PRIMARY KEY keyword. That's because it's at the end of the table and you need a way to tell it what column you are talking about. The option of putting it at the end of the table has the added benefit in this situation because if we needed to have a primary key that is the combination of multiple columns, we can do that by just adding the other column in the PRIMARY KEY parenthesis right after a comma. In summary, there are three ways to make constraints. The first is at the column level, unnamed. The second is at the column level, named. The third is at the table level, also named. In the next video we are going to create a named constraint in Oracle SQL Developer, so stay tuned and be sure to subscribe! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support me! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 16584 Caleb Curry
SQL - Rownum in mysql || Add counter or row number column
 
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SELECT @add_row:[email protected]_row+1 AS row_number, first_name FROM customers, (SELECT @add_row:=100)A
Views: 330 Data Disc
PIVOT Tutorial - generating dynamic column with PIVOT Interview Question SQL
 
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In this lecture you will learn about PIVOT operator and using it to generate dynamic columns.PIVOT is very use full operator to convert values into columns. PIVOT: •Convert your output from (values)vertical order to horizontal(making columns) one Topic to cover: •PIVOT example •PIVOT syntax •Interview Question •PIVOT on northwind •Dynamic PIVOT query http://www.techsapphire.in/index/pivot_sql_lesson_with_generating_dynamic_columns_with_pivot/0-158
Views: 30815 techsapphire
Splitting one column into two or more columns
 
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Oracle Excel will show you how to split a columns text into two or more colunms
Views: 147 Oracle Excel
SQL Aggregation queries using Group By, Sum, Count and Having
 
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From SQL Queries Joes 2 Pros (Vol2) ch4.1. Learn up to write aggregated queries.
Views: 178217 Joes2Pros SQL Trainings
Oracle Database11g tutorials 14 : How to CREATE TABLE using sql developer and command prompt
 
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Oracle Database11g tutorials 14 How to Create table using command prompt and Create table using sql developer Blog Link http://bit.ly/1TkY4Oe Time Line 0:25 Introduction of Tables in Database 1:03 What is Create Table (Introduction of create table) 1:30 Syntax of Create Table 2:08 How to create table using Command Prompt 4:55 How to create table using SQL Developer Links for Oracle Database tutorials 4: database connectivity using SQL developer and command prompt http://youtu.be/wSqoXRlXDUU You can have indepth knowledge about SQL create table here http://www.rebellionrider.com/sql-create-table.html Tool used in this tutorial is command prompt. This tutorial series is part of SQL expert exam certification training. if you are preparing for SQL certification you can use my tutorials. This SQL Tutorial is a part of free training. Copy Cloud referral link || Use this link to join copy cloud and get 20GB of free storage https://copy.com?r=j7eYO7 Contacts E-Mail [email protected] Twitter https://twitter.com/rebellionrider Instagram http://instagram.com/rebellionrider Facebook. https://www.facebook.com/imthebhardwaj Linkedin. http://in.linkedin.com/in/mannbhardwaj/ Thanks for linking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com Today in this oracle database tutorial we will see How to CREATE A TABLE. if we have to define a table in layman language then we can say that Tables are just a collection of Rows and Columns but In RDBMS tables are database objects which help in organizing data into ROWS and COLUMNS. We can also say that SQL tables are kind of data structure which are used by database for efficient storage of data. To create a table in our database we use SQL CREATE TABLE command. SQL CREATE TABLE is a type of DATA DEFINITION LANGUAGE also known as DDL. To Create a table in your schema you will require CREATE TABLE system privilege. In our future videos we will see what are system and object privileges and how to grant them to a user. Today for this video we will be using Sample schema HR which already has all the necessary privileges. Ohk Let's see the syntax. CREATE TABLE table name ( column name1 Data-Type(size), column name2 Data-Type(size), ..... ); CREATE TABLE is an oracle reserved word or say an Oracle key word whereas There are 3 different ways of creating a table in Oracle database. Creating a table using Command Line Interface (CLI) in Oracle database For demonstrating how to create table in oracle database using CLI, I'll be using Command prompt. Thats how we create table using command prompt. you can check your table structure by DESCRIBE command for that just write DESC and your table name. Like this Another way of creating a table is by using Graphic user interface (GUI) in Oracle database To demonstrate how to create table using GUI we will use SQL developer. Lets open our SQL developer I am connected to HR schema if you do not know how to create a connection to database using SQL developer please watch my oracle database tutorial 4 that explains database connectivity using SQL developer and command prompt. Link for this video is in the description below. So lets create a table. Creating a table using SQL developer is very easy we do not have to fire any query here. Let's start First of all right click on your connection in which you want to create a table and choose schema browser. This will open a separate schema browser pane or you can expend your connection by clicking this + sign and then right click on table and choose New Table. However I prefer working with schema browser so let's skip to schema browser pane here from the first drop-down list you can choose connection name and in the second drop down list you can choose what database objects you want to work with we want to create a table thus I'll choose table and then click this arrow here and choose option for new table Ok we have created a table wizard first of all give a unique name to your table and add some column as well. For this, click the green plus button. Now we already have a column so give it some name. Also choose a datatype from the list and specify any size you can check this not null column if in case you want to make this a mandatory column you can also specify default value and constraint If you want to make this column a primary key you can click here In my future video i'll show you what are these constraints and different ways of applying them on a column in a table. for this video we will concentrate on create table only so when you are done with all your columns click ok Thats your table You can double click on your table here and can see its structure. Thats it
Views: 183783 Manish Sharma
Oracle Database 12c Security - Oracle Virtual Private Database (VPD)
 
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Learn how to use Oracle Virtual Private Database (VPD) to secure your data. See all lessons at http://skillbuilders.com/12c-TSDP-Tutorial First, Virtual Private Database. What is it? Answer: It's a declarative technique for enforcing security. Typically, it's based on user application context. That was the first limitation of 8i. Backed with 8i context were session-specific. The context variables were sort in the PGA. That means you simply couldn't use this in a web environment. However, global context, with use of 9i, Virtual Private Database became usable for web applications with connection pooling. But whether you're using it to client server or on a three tier environment, it's declarative technique rather than a programmatic technique. I can go behind the back of the application as a DBA and generate predicates to get appended to all SQLs. Select, insert, update, delete the end users. Issue the SQL and I will generate a predicate that filters the access. It's impossible to bypass. All users will have predicates appended to all their code. It doesn't matter whether they're using SQL Plus, Discoverer, Business Objects, Crystal Reports, eBusiness Suites, whatever they're using, I as DBA can filter their access to roles. The end result, different users see different data sets while running the same code and accessing the same tables, hence, the name Virtual Private Database. Different users will think they're seeing a totally different set of tables, but in fact it's one column database, one set of tables hosting a single application shared by all the users. The mechanism - you can apply VPD to tables, to views, to synonyms, and a declarative technique. Once the technique you write a function that generates the predicate, you associate the function with the table. From then on whenever the user issue SQL against that table the Cost-Based Optimizer rewrites the code. The Cost-Based Optimizer rewrites the user SQL to call the function to generate the predicate. The predicate is then appended to the SQL and it's the modified SQL that is parsed and executed. Let's see how this actually works. I'm working here by the way. This is just a perfectly normal 12.1 database. But what I'm going to demonstrate at this point will in fact work on 11g as well. I'm not going to be using any of the 12c enhancements to VPD for this little demonstration. I'll work in the scott schema. What do we have to do? We write a function to generate the predicate string. Create function. And I'll my function vpdf. The function must conform to a fixed specification. It must take two varchar arguments. One of the arguments is intended to be the schema to which the function will be applied. The other argument is the object within the schema to which the function will be applied. And it must return a varchar2, which is the generated predicate. Let's begin. Within this function you can do just about anything. There are some limitations. It's impossible for the function to query or update the table against which the VPD calls here is going to be applied or we violate the rules of purity that we come across so often with PL/SQL. But apart from that, it can do just about anything - including a number of dreadful side effects can be introduced by writing VPD functions. I'm going to do a very simple one on this one. I'll shall simple return immediately a predicate. What predicate? Ename, which is the ename column from this scott.emp table. Ename should equal sys_context. I'll go to the local context, my user end context, and just extract session user. We can see that John has tested this earlier today and therefore the object already was suggesting and he's just dropping it now and cleaning up the recreate. I hope you realize these really are live demonstrations. I'm not just running scripts. I've created a function. What's that function going to do? It's going to return this value here. Test it. Always test it and see what it's actually going to do. I'll select vpdf. I have to give it a couple of arguments. This one will do for now.
Views: 4570 SkillBuilders
How to column add and delete in Oracle SQL
 
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How to column add and delete in Oracle SQL
Views: 74 Tanmun
Oracle Invisible Column
 
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Oracle 12c new feature - Invisible column https://easy-learning-tech.blogspot.com/2018/05/invisible-column-from-oracle-12c.html oracle 12c new features for developers
Views: 160 Siva Academy
Part 6   Transform rows into columns in sql server
 
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Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/06/part-6-transform-rows-into-columns-in.html This is another common sql server interview question. We will be using Countries table in this example. SQL to create the table Create Table Countries ( Country nvarchar(50), City nvarchar(50) ) GO Insert into Countries values ('USA','New York') Insert into Countries values ('USA','Houston') Insert into Countries values ('USA','Dallas') Insert into Countries values ('India','Hyderabad') Insert into Countries values ('India','Bangalore') Insert into Countries values ('India','New Delhi') Insert into Countries values ('UK','London') Insert into Countries values ('UK','Birmingham') Insert into Countries values ('UK','Manchester') Here is the interview question. Write a sql query to transpose rows to columns. Using PIVOT operator we can very easily transform rows to columns. Select Country, City1, City2, City3 From ( Select Country, City, 'City'+ cast(row_number() over(partition by Country order by Country) as varchar(10)) ColumnSequence from Countries ) Temp pivot ( max(City) for ColumnSequence in (City1, City2, City3) ) Piv
Views: 199937 kudvenkat
Oracle || Oracle Number Functions Part -2 by Siva
 
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DURGASOFT is INDIA's No.1 Software Training Center offers online training on various technologies like JAVA, .NET , ANDROID,HADOOP,TESTING TOOLS , ADF, INFORMATICA,TABLEAU,IPHONE,OBIEE,ANJULAR JS, SAP... courses from Hyderabad & Bangalore -India with Real Time Experts. Mail us your requirements to [email protected] so that our Supporting Team will arrange Demo Sessions. Ph:Call +91-8885252627,+91-7207212428,+91-7207212427,+91-8096969696. http://durgasoft.com http://durgasoftonlinetraining.com https://www.facebook.com/durgasoftware http://durgajobs.com https://www.facebook.com/durgajobsinfo............
SQL 12c  Tutorial 18 : SQL  Invisible Column options in SQL 12c New Features
 
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SQL 12c Tutorial 18 : SQL Invisible Column options in SQL 12c New Features SQL 12c Tutorial for beginners Oracle SQL 12c Tutorial for beginners Oracle SQL 12c New Features
Views: 695 TechLake
Editing the Formula for a Column Using Oracle BI EE
 
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This video teaches you how to add a column, and then edit the formula for that column. To find out more about Oracle BI EE, see the documentation at https://docs.oracle.com/en/middleware Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Get Table Names with Column Names and Data Types in SQL Server - SQL Server Tutorial
 
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In this video ,we will generate the script that will return us all the table names with column names and data type of those columns. We often need this information. Let's say we are going to prepare mapping document for load the data from Source Database to Destination database. We can get the list of all tables with column names and data types from Source Database and Destination Database and then paste in Excel and map the required input columns to output columns for ETL Process. Blog link with scripts used in video http://sqlage.blogspot.com/2015/02/get-all-tables-with-column-names-and.html
Views: 49690 TechBrothersIT
Tutorial#34 How to find the length of column in Oracle SQL | Length Function
 
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How to find the length of a string/column in Oracle SQL , this course for Oracle SQL beginner or Length Function is used to determine the Length of string OR This function is used to calculate the length of a string or column in query or How to use Length function in Oracle SQL or How to get the length of a string in SQL or The Oracle LENGTH function allows you to find the length of a string, also known as the number of characters in a string. Assignment link: https://drive.google.com/open?id=1b-pcf28jyVvm9GN9pn5I6HYtYiSd_Bj2 In this series we cover the following topics: SQL basics, create table oracle, SQL functions, SQL queries, SQL server, SQL developer installation, Oracle database installation, SQL Statement, OCA, Data Types, Types of data types, SQL Logical Operator, SQL Function,Join- Inner Join, Outer join, right outer join, left outer join, full outer join, self-join, cross join, View, Sub-query, Set Operator. follow me on: Facebook Page: https://www.facebook.com/LrnWthr-319371861902642/?ref=bookmarks Contacts Email: [email protected] Instagram: https://www.instagram.com/equalconnect/ Twitter: https://twitter.com/LrnWthR
Views: 129 EqualConnect Coach
Sql &plsql Interview 13-UNPIVOT FUNCTION(COLUMN BASED DATA INTO SEPARATE ROWS)
 
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Join My Facebook Page to Learn SQl,PLSQL,FORMS, REPORTS,ORACLE TOOLS,DISCOVERER REPORTS Update Videos... https://www.facebook.com/Oracle-SQL-PLSQL-Practical-Discussion-334342290310499/?notif_id=1514905617324010 whatsup number:-08508598428
Views: 93 Manikandan R
SQL Tutorial - 12: Inserting Data Into Tables
 
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In this tutorial we'll learn to insert data into tables using the INSERT INTO statement.
Views: 183121 The Bad Tutorials
Oracle Database tutorials 3:How to enable Line numbers in SQl Developer.
 
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Wishlist: http://bit.ly/wishlist-amazon In this tutorial for database 11g You will see how to enable Line numbers in SQL Developer. This SQL tutorial and Oracle database 11g tutorial for beginners will show how to enable Line numbers in SQL Developer. Tool used in this tutorial is SQL developer. This tutorial series is part of SQL expert exam certification training. if you are preparing for SQL certification you can use my tutorials. This SQL Tutorial is a part of free training. Copy Cloud referral link || Use this link to join copy cloud and get 20GB of free storage https://copy.com?r=j7eYO7 Contacts Email [email protected] Twitter https://twitter.com/rebellionrider Instagram http://instagram.com/RebellionRider Facebook. https://www.facebook.com/imthebhardwaj Linkedin. in.linkedin.com/in/mannbhardwaj/ Thanks for linking, commenting, sharing and watching more of our videos
Views: 254795 Manish Sharma
Managing Oracle Database In-Memory
 
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In this second of three presentations, Maria Colgan explains how to control which objects get populated into the column store and how to monitor the performance of queries against the column store.
Hod do I create sequence in Oracle? (Auto number in Oracle) (ICD) - icdstudents.com
 
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To get auto number in Oracle. How do create sequence in Oracle? Attributes of sequence Oracle
Views: 6307 Bhavin Trivedi
Part 4   Delete duplicate rows in sql
 
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Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/05/part-4-delete-duplicate-rows-in-sql.html In this video, we will discuss deleting all duplicate rows except one from a sql server table. SQL Script to create Employees table Create table Employees ( ID int, FirstName nvarchar(50), LastName nvarchar(50), Gender nvarchar(50), Salary int ) GO Insert into Employees values (1, 'Mark', 'Hastings', 'Male', 60000) Insert into Employees values (1, 'Mark', 'Hastings', 'Male', 60000) Insert into Employees values (1, 'Mark', 'Hastings', 'Male', 60000) Insert into Employees values (2, 'Mary', 'Lambeth', 'Female', 30000) Insert into Employees values (2, 'Mary', 'Lambeth', 'Female', 30000) Insert into Employees values (3, 'Ben', 'Hoskins', 'Male', 70000) Insert into Employees values (3, 'Ben', 'Hoskins', 'Male', 70000) Insert into Employees values (3, 'Ben', 'Hoskins', 'Male', 70000) The delete query should delete all duplicate rows except one. Here is the SQL query that does the job. PARTITION BY divides the query result set into partitions. WITH EmployeesCTE AS ( SELECT *, ROW_NUMBER()OVER(PARTITION BY ID ORDER BY ID) AS RowNumber FROM Employees ) DELETE FROM EmployeesCTE WHERE RowNumber ] 1
Views: 350624 kudvenkat
Convert text to columns in Excel
 
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http://ShowMeAcademy.com - Convert text to columns in Microsoft Excel 2007
Views: 495003 bytebodger
Tutorial#33 How to Join  two Columns using concatenation function in Oracle SQL Database
 
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How to concatenate/join/combine two or more columns, string, Number using Concatenation Function or How to Concatenate String and Integer Values in SQL Server or Concatenate String and column by using Concatenation function in Oracle SQL Or How to use Concatenation Function in Oracle database Assignment link: https://drive.google.com/open?id=1u-2Mj-27KxM5FZwRTVXNv7dwXQsAtzkn In this series we cover the following topics: SQL basics, create table oracle, SQL functions, SQL queries, SQL server, SQL developer installation, Oracle database installation, SQL Statement, OCA, Data Types, Types of data types, SQL Logical Operator, SQL Function,Join- Inner Join, Outer join, right outer join, left outer join, full outer join, self-join, cross join, View, SubQuery, Set Operator. follow me on: Facebook Page: https://www.facebook.com/LrnWthr-319371861902642/?ref=bookmarks Contacts Email: [email protected] Instagram: https://www.instagram.com/equalconnect/ Twitter: https://twitter.com/LrnWthR
Views: 89 EqualConnect Coach
SQL Tutorial - 7: Data-Types in SQL (Part-2)
 
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In this tutorial we';; check out the data type options we have available for use in SQL. We'll talk about Bigint, int, smallint, tinyint, decimal, number, float, char, varchar, blob, datetime, date, time and year.
Views: 101245 The Bad Tutorials
Oracle SQL Developer Tutorial For Beginners  75   SELECT PARTICULAR COLUMNS
 
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Oracle SQL Developer Tutorial For Beginners Series. This course introduces Oracle SQL Development for its subscribers. Currently this is based on Oracle 12c. The test environment is in Windows 10.
Views: 630 Sam Dhanasekaran
Identity Column in oracle 12c
 
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How to create auto increment Identity column in oracle 12 c. http://onlymastermind.blogspot.com/
How to Increment Letters and Number Combinations LTS0001 becomes LTS0002 etc
 
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In this lesson, we take a sheet with varying Letters followed by a sequence number and learn to increment the correct Item number in sequence. So if the last COPPER unit was COP0001, then the next one should be COP0002, and if the last SILVER one was SIL0016 then **Limited Offer** Learn to Make Excel Do Your Work For You with The Ultimate Excel Programmer Course – Get the Full 9+ Hour Premium Course for 75% off using coupon code: https://www.udemy.com/ultimate-excel-programmer/?couponCode=2016YOUTUBE75 Click Now to Order and get Lifetime Access to Course, Workbooks, Updates and Support! ------------------------ Create Your Own Barcode Lookup System Using Excel VBA. Learn to Make Your Own Barcode Labels the Easy way and have fun with Barcode Scanners to Automate your Workflow! In this project-driven Course, you’ll learn to Build your own Custom Inventory System with Step-By-Step video instructions. This goes in depth into some advanced Userform strategies that you can use for your other projects to come. A great weekend study! YouTube Subscibers only pay one forth! Get your 75% off Coupon here: https://www.udemy.com/barcodes-excelvba/?couponCode=2016YOUTUBE75 ------------------------ Too busy to Learn Piano? Use my Secrets and Play Your Favorite Songs Today! Did you know; You can learn 4 basic chords in about 5 minutes and instantly be able to play millions of songs. Seriously, check this course out. 75% off for my YouTube Friends! Click here: https://www.udemy.com/play-piano-by-ear-today-supercourse/?couponCode=2016YOUTUBE75 For Articles, Updates and to Contact me for Consulting or just to drop me a line, please visit http://www.ExcelVbaIsFun.com To download this FREE workbook(source code included): Click the link below. http://excelvbaisfun.com/mdocs-posts/how-to-increment-letters-and-number-combinations-lts0001-becomes-lts0002-etc/ ------------------------ Playlists: Excel Vba Basics http://www.youtube.com/watch?v=AIhKNNXzZLM&list=PLw8O1w0Hv2ztGjIkrW7suD6oNDaOk3vbR&index=1 Tips N Tricks https://www.youtube.com/playlist?list=PLw8O1w0Hv2zsPU-k2vPZ_6brD5Gk1sVy_ Userforms https://www.youtube.com/playlist?list=PLw8O1w0Hv2zvnLFyiMrihcaOqA0sT0X2U Sample Excel Programs https://www.youtube.com/playlist?list=PLw8O1w0Hv2zuP-BE7tV1UjWa0ZexZqY89 Events Series https://www.youtube.com/playlist?list=PLw8O1w0Hv2zvf-YaBApsIHloI9G6Cq1Wh Activex Controls https://www.youtube.com/playlist?list=PLw8O1w0Hv2zupzNIWkZCOYYngTtMH5nSf ------------------------ Grab an Excel Nerd T-Shirt or Hoodie: http://ExcelVbaIsFun.spreadshirt.com/ ------------------------ Interact and Follow me on: LinkedIn: http://www.linkedin.com/in/danielcstrong Facebook: https://www.facebook.com/Excelvbaisfun/ Twitter: https://twitter.com/ExcelVbaIsFun Google Plus+: http://www.google.com/+ExcelVbaIsFun 'Royalty Free Music by http://audiomicro.com/royalty-free-music'
Views: 17158 ExcelVbaIsFun
12. DATE, DATATIME and TIMESTAMP Data Type in SQL (Hindi)
 
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Please Subscribe Channel Like, Share and Comment Visit : www.geekyshows.com
Views: 32207 Geeky Shows
Part 5   SQL query to find employees hired in last n months
 
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Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/05/part-5-sql-query-to-find-employees.html This question is asked is many sql server interviews. If you have used DATEDIFF() sql server function then you already know the answer. -- Replace N with number of months Select * FROM Employees Where DATEDIFF(MONTH, HireDate, GETDATE()) Between 1 and N
Views: 179650 kudvenkat