查找所有重复标题的记录：selecttitle,count(*)ascountfromuser_tablegroupbytitlehavingcount>1;SELECT*FROMt_infoaWHERE((SELECTCOUNT(*)FROMt_infoWHERETitle=a.Title)>1)ORDERBYTitleDESC一、查找重复记录1、查找全部重复记录SELECT*FROMt_infoaWHERE((SELECTCOUNT(*)FROMt_infoWHERETitle=a.Title)>1)ORDERBYTitleDESC2、过滤重复记录(只显示一条)Select*FromHZT