求SQL，在线,该怎么解决

求SQL，急，在线
ID CODE
502Y1111
602Y1111
1002Y1111
1602Y1111
1702Y1111
18 02Y1111

求一条DELETE的SQL，后变为
ID CODE
502Y1111
1002Y1111
1602Y1111

意思是相连的ID，只要第一条。

[解决办法]

SQL code

declare @t table (ID int,CODE varchar(7))insert into @tselect 5,'02Y1111' union allselect 6,'02Y1111' union allselect 10,'02Y1111' union allselect 16,'02Y1111' union allselect 17,'02Y1111' union allselect 18,'02Y1111'select * from @t where ID in(select min(ID) from (select *,rid=(select count(1) from @t where ID<=a.ID) from @t a) b group by ID-rid)/*ID          CODE----------- -------5           02Y111110          02Y111116          02Y1111*/