Constraint where both columns cannot be null, but one can2023-11-28 16:29:10 ALTER TABLE TableA ADD CONSTRAINT CK_BothDepartsNotNull CHECK (departA IS NOT NULL OR departB IS NOT NULL) 上一篇:Linux中SysRq的使用(魔术键)下一篇:帝国cms7.0整合百度编辑器ueditor教程