mysql 資料表中查詢重複記錄
阿新 • • 發佈：2018-12-21
1、單個欄位
查詢所有重複資料
select * from ActivityWinUser where (UID) in(select UID from ActivityWinUser group by UID having count(*)>1);
去重
delete from table where Name in(select Name from table group by Name having count(*)>1);
2、多個欄位
查詢所有重複資料
select * from table a where (a.UID,a.ActivityID) in (select UID,ActivityID from table group by UID,ActivityID having count(*) > 1) ;
3、去除重複記錄
select *, count(distinct name) from table group by name
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作者：想你時的孤獨
來源：CSDN
原文：https://blog.csdn.net/u013091013/article/details/51333155
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注：select ex_id from zqc_log_exzdcs where d_created_date>'2018-12-20 17:12:00' and d_created_date<'2018-12-20 17:15:00' group by ex_id having count(*)>1;