2022-04-21 分類: 網(wǎng)站導(dǎo)航
select * from hztj a where (a.sdxzqhdm) in (select sdxzqhdm from hztj group by sdxzqhdm having count(*) > 1)
select count(sdxzqhdm) as '重復(fù)次數(shù)',sdxzqhdm from hztj group by sdxzqhdm having count(*)>1 order by sdxzqhdm desc
查詢及刪除重復(fù)記錄的方法select * from hztj
where sdxzqhdm in (select sdxzqhdm from hztj group by sdxzqhdm having count(sdxzqhdm) > 1)
(2)刪除表中多余的重復(fù)記錄,重復(fù)記錄是根據(jù)單個字段來判斷,只留rowid最小的記錄delete from hztj
where sdxzqhdm in (select sdxzqhdm from hzth group by sdxzqhdm having count(sdxzqhdm) > 1)(3)查找表中多余的重復(fù)記錄(多個字段)
select * from hztj a
where (a.sdxzqhdm,a.edxzqhdm) in (select sdxzqhdm,edxzqhdm from hztj group by sdxzqhdm,edxzqhdm having count(*) > 1)
delete from hztj a
where (a.sdxzqhdm,a.edxzqhdm) in (select sdxzqhdm,edxzqhdm from hztj group by sdxzqhdm,edxzqhdm having count(*) > 1)(5)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 hztj a
where (a.sdxzqhdm,a.edxzqhdm) in (select sdxzqhdm,edxzqhdm from hztj group by sdxzqhdm,edxzqhdm having count(*) > 1)
and rowid not in (select min(rowid) from hztj group by sdxzqhdm,edxzqhdm having count(*)>1)
當前名稱:sql語句查詢表中重復(fù)數(shù)據(jù)(多類型)創(chuàng)新互聯(lián)
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