SQL5 DDL CREATE ALTER DROP 스키마 create schema A default character set utf8; drop schema A; create database B default character set utf8mb4; drop database B; create tablename(); not null default primary key foreign key references unique check on delete/on update 기본키 a varchar(10) not null primary key, = constraint a_b primary key a 외래키 constraint A_B foreign key (b) references B (b); 복합키 constraint a_b pri.. 2022. 10. 5. 이전 1 2 다음