SQL重復記錄查詢的幾種方法

1 查找表中多余的重復記錄，重復記錄是根據單個字段
1 select * from  TB_MAT_BasicData1
2 where MATNR in ( select MATNR from  TB_MAT_BasicData1 group by MATNR having count(MATNR)>1)

2.表需要刪除重復的記錄（重復記錄保留1條），

select distinct * into #Tmp from TB_MAT_BasicData1
drop table TB_MAT_BasicData1
select * into TB_MAT_BasicData1 from #Tmp
drop table #Tmp

 

3.查詢重復
select count(1),UnitsofmeasureGuid from TB_MAT_UnitsOfMeasure
group by UnitsofmeasureGuid
having count(1)>1