摘要: 1.查询单列重复: select * from test where name in (select name from test group by name having count (name) > 1) 2.查询多列重复 SELECT a.* FROM test a,( SELECT name 阅读全文
posted @ 2021-05-24 15:27 张伟大 阅读(921) 评论(0) 推荐(0) 编辑