------------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