Open practice opened 9 years ago
http://egloos.zum.com/kwon37xi/v/1635464 참고
ALTER TABLE users MODIFY username varchar(36) not null unique;
ALTER TABLE users ADD type CHAR(1) DEFAULT 'U' NOT NULL;
http://egloos.zum.com/kwon37xi/v/1635464 참고
column 수정
column 추가