SQL Constraints fits as DML or DDL?

Question

DDL - Data Definition language: is used to create and change tables (CREATE, ALTER, etc.), right?

DML - Data Manipulation language: is used for handling table data (INSERT, UPDATE, DELETE, SELECT).

CONSTRAINTS fall into the DDL category?

Answer 1

Yes, contraints are part of that category. They are used to create tables to ensure rules about the fields you are creating, an example is primary key or null support.