SQL技能 查找表中某两列值重复的行例子select * from relation_map awhere exists (select 1from relation_map bwhere b.primary_id = a.primary_idand (a.slave_id<> b.slave_id))学自：https://bbs.csdn.net/topics/39035... 工具效能 2023-12-06 51 点赞 0 评论 77 浏览
