Data Definition Language (DDL)

Data Definition Language (DDL) statement are used to define the database structure or schema. some example: (1) Create - To create object in database. (2) Alter - To alter the structure of the database. (3) Drop - Delete object the structure from the database. (4) Truncate - Remove all the record from a table, include all space allocated for the records are remove. (5) Comment - Add commands to data dictionary. (6) Rename - Rename an object.