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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.
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