SQL重复记录查询的几种方法
1 查找表中多余的重复记录,重复记录是根据单个字段
1 select * from TB_MAT_BasicData1 2 where MATNR in ( select MATNR from TB_MAT_BasicData1 group by MATNR having count(MATNR)>1)
2.表需要删除重复的记录(重复记录保留1条),
select distinct * into #Tmp from TB_MAT_BasicData1 drop table TB_MAT_BasicData1 select * into TB_MAT_BasicData1 from #Tmp drop table #Tmp
3.查询重复 select count(1),UnitsofmeasureGuid from TB_MAT_UnitsOfMeasure group by UnitsofmeasureGuid having count(1)>1
明天的你会感谢今天拼命奋斗的自己