摘要: select t1.id , t1.t_class , t1.teacherfrom t_class t1 left join (select * from t_class where id=1) t2 on t1.t_class = t2.t_class and t1.id = t2.idwher 阅读全文
posted @ 2019-07-03 21:11 玄空2 阅读(371) 评论(0) 推荐(0) 编辑