各位用户为了找寻关于sql2000数据库清除重复数据的二种方法的资料费劲了很多周折。这里教程网为您整理了关于sql2000数据库清除重复数据的二种方法的相关资料,仅供查阅,以下为您介绍关于sql2000数据库清除重复数据的二种方法的详细内容
使用游标实现
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
代码如下: delete from evaeve where id not in( select max(id) from evaeve group by E_RecordID)