MySQL: 외래키 제약 조건 끄기
MySQL
SET FOREIGN_KEY_CHECKS=0;SET FOREIGN_KEY_CHECKS=1;
PostgreSQL
SET CONSTRAINTS ALL DEFERRED;
SQLite
PRAGMA foreign_keys = OFF;
SET FOREIGN_KEY_CHECKS=0;SET FOREIGN_KEY_CHECKS=1;SET CONSTRAINTS ALL DEFERRED;PRAGMA foreign_keys = OFF;