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游标版 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
游标版
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
sql语句版
delete from evaeve where id not in( select max(id) from evaeve group by E_RecordID)
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 delete from evaeve where id not in( select max(id) from evaeve group by E_RecordID)
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