sql2000数据库清除重复数据的二种方法_MsSql

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所属分类:MSSQLSERVER


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 @[email protected]_REcordid
BEGIN
  delete from evaeve where [email protected]
end
set @[email protected]
set @[email protected]_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)


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