sql2000数据库清除重复数据的二种方法
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,@
使用游标实现复制代码 代码如下:declare @id1 int,@oldid int,@e_REcordid int ,@Olde_REcordid intDECLARE price CURSORFOR SELECT id ,E_recordId FROM evaeve order by E_recordId descOPEN priceFETCH NEXT FROM price into @oldid,@Olde_REcordidwhile @@fetch_status = 0beginFETCH NEXT FROM price into @id1,@e_REcordid
if @Olde_REcordid=@e_REcordidBEGIN delete from evaeve where id=@id1end set @oldid=@id1set @Olde_REcordid=@e_REcordidend 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)
