題主可 參考下列例句:

讓客戶滿意是我們工作的目標(biāo),不斷超越客戶的期望值來自于我們對(duì)這個(gè)行業(yè)的熱愛。我們立志把好的技術(shù)通過有效、簡單的方式提供給客戶,將通過不懈努力成為客戶在信息化領(lǐng)域值得信任、有價(jià)值的長期合作伙伴,公司提供的服務(wù)項(xiàng)目有:主機(jī)域名、網(wǎng)絡(luò)空間、營銷軟件、網(wǎng)站建設(shè)、沙灣網(wǎng)站維護(hù)、網(wǎng)站推廣。
刪除表t1字段col1有重復(fù)的記錄
delete from t1 where exists
(select 1 from (select col1 from t1 group by col1 having count(1)1) t where t.col1=t1.col1);
如果希望對(duì)于有重復(fù)的記錄希望保留其中一條記錄而不是全部刪除,則可以運(yùn)行下列語句,前提是數(shù)據(jù)表必須含有自增id列。
delete from t1 where exists
(select 1 from (select col1,max(id) as id from t1 group by col1 having count(1)1) t where t.col1=t1.col1 and t.idt1.id);
找到最大的rowid即可。
Sql代碼:
alter?proc?getNotDupData??
as??
--clear?temp?table??
delete?ODS.dbo.Agent??
delete?from?stage.dbo.tmpDup??
delete?from?stage.dbo.tmpRowNo??
delete?from?stage.dbo.tmpMaxRowNo??
--create?dup?table??
insert?into?stage.dbo.tmpDup??
select?distinct?AgentLogin,AgentSurName,AgentGivenName???from?stage.dbo.dAgentPerformanceStat??
where?AgentSurname?is?not?null?and?agentlogin?like?'3%'??order?by?AgentLogin??
--add?rowNo??
insert?into?tmpRowNo??
select?*,ROW_NUMBER()over(order?by?AgentLogin)?as?rowno??from?tmpDup???
--get?max?rowno??
insert?into??stage.dbo.tmpMaxRowNo??
select?max(rowno)?as?'rowno'???from?stage.dbo.tmpRowNo??group?by?AgentLogin?having?count(*)1??
--remove?max?rowno??
delete?from?stage.dbo.tmpRowNo?where??rowno?in?(select?*?from?stage.dbo.tmpMaxRowNo)??
--insert?into?ods??
insert?into?ODS.dbo.Agent?select?AgentLogin,AgentSurName,AgentGivenName?from?stage.dbo.tmpRowNo
select distinct * into #tmp from s2
drop table s2
select * into s2 from #tmp
drop table #tmp
利用臨時(shí)表刪除重復(fù)數(shù)據(jù)
本文名稱:sqlserver中重復(fù),sqlserver查詢重復(fù)數(shù)據(jù)
本文鏈接:http://chinadenli.net/article47/dseoshj.html
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