日本综合一区二区|亚洲中文天堂综合|日韩欧美自拍一区|男女精品天堂一区|欧美自拍第6页亚洲成人精品一区|亚洲黄色天堂一区二区成人|超碰91偷拍第一页|日韩av夜夜嗨中文字幕|久久蜜综合视频官网|精美人妻一区二区三区

刪除重復(fù)記錄的SQL語句是我們最常用的語句之一，下面就為您將介紹Oracle刪除重復(fù)記錄的SQL語句寫法，希望對您能有所幫助。

創(chuàng)新互聯(lián)主要從事網(wǎng)站設(shè)計制作、成都網(wǎng)站制作、網(wǎng)頁設(shè)計、企業(yè)做網(wǎng)站、公司建網(wǎng)站等業(yè)務(wù)。立足成都服務(wù)城廂,十余年網(wǎng)站建設(shè)經(jīng)驗,價格優(yōu)惠、服務(wù)專業(yè),歡迎來電咨詢建站服務(wù):028-86922220

1、查找表中多余的重復(fù)記錄，重復(fù)記錄是根據(jù)單個字段（peopleId）來判斷
select * from people
where peopleId in (select   peopleId from   people group by   peopleId having count(peopleId) > 1)

2、Oracle刪除重復(fù)記錄，重復(fù)記錄是根據(jù)單個字段（peopleId）來判斷，只留有rowid最小的記錄
delete from people
where peopleId in (select   peopleId from people group by   peopleId   having count(peopleId) > 1)
and rowid not in (select min(rowid) from   people group by peopleId having count(peopleId )>1)

注:rowid為oracle自帶不用該.....

查找表中多余的重復(fù)記錄（多個字段）
select * from vitae a
where (a.peopleId,a.seq) in   (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1)4、Oracle刪除重復(fù)記錄（多個字段），只留有rowid最小的記錄
delete from vitae a
where (a.peopleId,a.seq) in   (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1)
and rowid not in (select min(rowid) from vitae group by peopleId,seq having count(*)>1)

查找表中多余的重復(fù)記錄（多個字段），不包含rowid最小的記錄
select * from vitae a
where (a.peopleId,a.seq) in   (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1)
and rowid not in (select min(rowid) from vitae group by peopleId,seq having count(*)>1)

【編輯推薦】

oracle查詢當前時間的實現(xiàn)

帶您了解Oracle層次查詢

帶您深入了解Oracle臨時表

oracle查詢用戶所有表的語句

Oracle with語句的用法

本文名稱：Oracle刪除重復(fù)記錄的實現(xiàn)方法
文章源于：http://www.dlmjj.cn/article/dpciode.html