利用rowid删除重复记录保留一行

CREATETABLEbeke01(NAMEVARCHAR2(30),
ageNUMBER,
addressVARCHAR2(50));

INSERTINTObeke01
VALUES
('beke',
25,
'shanghai');

Insert3次，这时表中有3条重复纪录；

SELECTROWID,a.*FROMbeke01aWHERE(a.NAME,a.age)IN(SELECTNAME,ageFROMbeke01GROUPBYNAME,ageHAVINGCOUNT(*)>1);查找重复的纪录

SELECTROWID,NAME,age,addressFROMbeke01WHEREROWIDIN(SELECTMAX(ROWID)FROMbeke01GROUPBYNAME,age,address);

DELETEFROMbeke01WHEREROWIDNOTIN(SELECTMAX(ROWID)FROMbeke01GROUPBYNAME,age,address);