sql多表联合查询二个查询实例:sql多表联合查询二个查询实例 先看常用的查询 两表结构不一样 m.* , n.* from t1 m, t2 n where m.id = n.id and n.date = (select max(date) from t2 where id = n.id) select m.* , n.* from t1 m, t2 n wh