DDL, DML, DCL and TCL

DDL (Data Definition Language)	DML (Data Manipulation Language)	DCL (Data Control Language)	TCL (Transaction Control Language)
Create	Select	Grant	Commit
Alter	Insert	Revoke	Savepoint
Drop	Update		rollback
Truncate	Delete		Set transaction
Comment	Merge
Rename	Call
	Explain plan
	Lock-table