Where to learn DDL?

Question

MySQL

I started learning SQL on the sql-ex.ru website, but only DML and code optimization are taught there.
More time is devoted to these areas.
I already know DML well and want to learn how to design.
But I don't want to learn from books, after DML on sql-ex.ru.
I am looking for the same site to learn DDL.
Please recommend a good site for learning DDL.

Answer 1

Well, as if there is an official MySQL documentation . There is nothing special to study.

Answer 2

w3schools SQL Database section on the left