[MySQL] Data Definition Language (DDL)
Today We are going to study DDL. It include CREATE, ALTER, DROP, RENAME and TRUNCATE. So Let's get it. Create table, We maed a table called test3. Drop table, It's easy just type it. alter table tablename add tel int; alter table name drop tel; alter table tablename modify tel int; , this is mean that modify column attribute. alter table tablename change tel pongpong varchar(45); As you know We ..