Oracle-02: Classification of SQL Language or Composition of SQL Language

 

 

 

------------I have no other, only familiar with you, humble like a fool, eager to learn like a hunger------------

 

 

A summary:

 

 01. DDL ( Data Definition Language ) data definition language .

　　Used to create various objects in the database. Such as tables, views, indexes, synonyms, etc.

　　create      drop    truncate    alter

 02. DQL ( Data Query Language ) data query language .

      select   where  group by  having  order by

 03. DML ( Data Manipulation Language ) data manipulation language .

      Insert  update  delete

04. DCL ( Data Control Language ) data control language .

      grant   revoke  rollback  commit