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
原文：https://www.cnblogs.com/dqh123/p/10069351.html