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SQL Session for Beginners
Understanding DDL |DML | DCL |TCL
Video Tuition
Let’s share knowledge
SQL
• SQL (pronounced "ess-que-el") stands for Structured
Query Language. SQL is used to communicate with a
database. Acco...
DDL
• Data Definition Language (DDL) statements are used to define the database
structure or schema.
Commands:
1) CREATE -...
DML
• Data Manipulation Language (DML) statements are used for
managing data within schema objects.
Commands:
1) SELECT - ...
DCL
• Data Control Language (DCL) statements.
Commands:
1) GRANT - gives user's access privileges to database
2) REVOKE - ...
TCL
• Transaction Control (TCL) statements are used to manage the changes
made by DML statements. It allows statements to ...
contact me:
Video Tuition
Let’s share knowledge
http://evideotuition.blogspot.com
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NETWORKING PARTNERS
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Oracle/SQL For Beginners - DDL | DML | DCL | TCL - Quick Learning

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Oracle/SQL For Beginners - DDL | DML | DCL | TCL - Quick Learning

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Oracle/SQL For Beginners - DDL | DML | DCL | TCL - Quick Learning

  1. 1. SQL Session for Beginners Understanding DDL |DML | DCL |TCL Video Tuition Let’s share knowledge
  2. 2. SQL • SQL (pronounced "ess-que-el") stands for Structured Query Language. SQL is used to communicate with a database. According to ANSI (American National Standards Institute), it is the standard language for relational database management systems. SQL statements are used to perform tasks such as update data on a database, or retrieve data from a database. Video Tuition Let’s share knowledge
  3. 3. DDL • Data Definition Language (DDL) statements are used to define the database structure or schema. Commands: 1) CREATE - to create objects in the database 2) ALTER - alters the structure of the database 3) DROP - delete objects from the database 4) TRUNCATE - remove all records from a table, including all spaces allocated for the records are removed 5) RENAME - rename an object Video Tuition Let’s share knowledge
  4. 4. DML • Data Manipulation Language (DML) statements are used for managing data within schema objects. Commands: 1) SELECT - retrieve data from the a database 2) INSERT - insert data into a table 3) UPDATE - updates existing data within a table 4) DELETE - deletes all records from a table, the space for the records remain 5) MERGE - UPSERT operation (insert or update) Video Tuition Let’s share knowledge
  5. 5. DCL • Data Control Language (DCL) statements. Commands: 1) GRANT - gives user's access privileges to database 2) REVOKE - withdraw access privileges given with the GRANT command Video Tuition Let’s share knowledge
  6. 6. TCL • Transaction Control (TCL) statements are used to manage the changes made by DML statements. It allows statements to be grouped together into logical transactions. Commands: 1) COMMIT - save work done 2) SAVEPOINT - identify a point in a transaction to which you can later roll back 3) ROLLBACK - restore database to original since the last COMMIT Video Tuition Let’s share knowledge
  7. 7. contact me: Video Tuition Let’s share knowledge http://evideotuition.blogspot.com VIDEO PARTNERS NETWORKING PARTNERS

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