- Data Definition Language (DDL)
- Creation and modification of relational schema
- Schema objects include relations, indexes, etc.
- Data Manipulation Language (DML)
- Insert, delete, update rows in tables
- Query data in tables
- Data Control Language (DCL)
- Concurrency control, transactions
- Administrative tasks, e.g. set up database users, security permissions
|
Última modificación: Thursday, 17 de November de 2005, 16:49