SQL-Arten

Es gibt aber noch etliche Elemente, welche für die Definition der 
Datenstrukturen und  für die Datenabfrage zuständig sind.

SQL-Befehle sind grundsätzlich in drei Kategorien unterteilt:

Art		Beschreibung					Befehl
DML		Data Manipulation Language		SELECT, INSERT, UPDATE, DELETE
DDL		Data Definition Language		CREATE, ALTER, DROP
DCL		Data Control Language			GRANT, REVOKE

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