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 nam 阅读全文
posted @ 2020-05-16 11:34 turefalse 阅读(12184) 评论(0) 推荐(0)