步步为营-89-SQL语句(删除重复数据)

exec sp_addlinkedserver 'ITSV','','SQLOLEDB','远程服务器名或ip地址'
exec sp_addlinkedsrvlogin 'ITSV','false',null,'用户名','密码'
exec sp_dropserver 'ITSV' , ' droplogins ' --关闭连接

select * from openrowset ( 'SQLOLEDB' , 'sql服务器名' ; '用户名' ; '密码',数据库名.dbo.表名)

ps: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) >
--查看一下
select * from record_errorlog
where ProcInstID in (select ProcInstID from record_errorlog
group by ProcInstID
having count(ProcInstID) > );
--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) > )
and ErrorLogID not in (select max(ErrorLogID) from  record_errorlog group by ProcInstID having count(ProcInstID )>);