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sql

what is sql ?
Asked by intakhab khan alam | Mar 20, 2011 |  Reply now
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View Sujay kumar 's Profile
SQl Stand for Standard query language which work upon DML,DDL and DCL..
DML

DML is abbreviation of Data Manipulation Language. It is used to retrieve, store, modify, delete, insert and update data in database.

SELECT – Retrieves data from a table
INSERT - Inserts data into a table
UPDATE – Updates existing data into a table
DELETE – Deletes all records from a table

DDL

DDL is abbreviation of Data Definition Language. It is used to create and modify the structure of database objects in database.

CREATE – Creates objects in the database
ALTER – Alters objects of the database
DROP – Deletes objects of the database
TRUNCATE – Deletes all records from a table and resets table identity to initial value.

DCL

DCL is abbreviation of Data Control Language. It is used to create roles, permissions, and referential integrity as well it is used to control access to database by securing it.

GRANT – Gives user’s access privileges to database
REVOKE – Withdraws user’s access privileges to database given with the GRANT command
Jul 27, 2012