| 标题 | sql2000数据库清除重复数据的二种方法 |
| 范文 | 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) |
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