sql2000數(shù)據(jù)庫清除重復數(shù)據(jù)的二種方法
發(fā)布日期：2021-12-29 10:38 | 文章來源：gibhub
使用游標實現(xiàn)
復制代碼 代碼如下:
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語句實現(xiàn)
復制代碼 代碼如下:
delete from evaeve where id not in( select max(id) from evaeve group by E_RecordID)
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