使用游标实现

复制代码 代码如下:

declare @id1 int,@oldid int,@e_REcordid int ,@Olde_REcordid int

DECLARE price CURSOR

FOR SELECT id ,E_recordId FROM evaeve order by E_recordId desc

OPEN price

FETCH NEXT FROM price into @oldid,@Olde_REcordid

while @@fetch_status = 0

begin

FETCH NEXT FROM price

into @id1,@e_REcordid

if @Olde_REcordid=@e_REcordid

BEGIN

delete from evaeve where id=@id1

end

set @oldid=@id1

set @Olde_REcordid=@e_REcordid

end

close price

DEALLOCATE price

使用sql语句实现

复制代码 代码如下:

delete from evaeve where id not in( select max(id) from evaeve group by E_RecordID)