User talk:Siro75

 DDL statements are used to build and modify the structure of your tables and other objects in the database. When you execute a DDL statement, it takes effect immediately. e.g. create table, alter, drop,

DML manipulation language are used to work with the data in tables. e.g. insert, update, delete statements.

To make your DML changes visible to the rest of the users of the database, all you need to type after you are finished making changes is:

COMMIT;