标签:play 语句 span ide pen proc height group by 查看
1:删除重复数据
--第一步:先找到重复数据 select ProcInstID from record_errorlog group by ProcInstID having count(ProcInstID) > 1 --查看一下 select * from record_errorlog where ProcInstID in (select ProcInstID from record_errorlog group by ProcInstID having count(ProcInstID) > 1); --第二部 保留ErrorLogID最大的(也就是最新的数据) delete from record_errorlog where ProcInstID in (select ProcInstID from record_errorlog group by ProcInstID having count(ProcInstID) > 1) and ErrorLogID not in (select max(ErrorLogID) from record_errorlog group by ProcInstID having count(ProcInstID )>1);
标签:play 语句 span ide pen proc height group by 查看
原文地址:http://www.cnblogs.com/YK2012/p/7525416.html