Umarnin SQL an raba su zuwa nau'i bisa ga niyarsu: DDL (ayyana tsarin bayanai), DML (canja yadda ake aiki da bayanai), DCL (sarrafa tufarewa), da TCL (sarrafa jujjuyawa). Fahimtar waɗannan nau'ikan zai shirya iliminka na SQL kuma zai bayyana yadda ake tsara harshen.
DDL — Data Definition Language (yana ayyana tsari)
users (id , name ());
users email ();
users;
logs;
