create table g (goods varchar(2),lot varchar(3),bal int)
create table o (oid varchar,goods varchar(2),qty int)
insert g select 'aa','p01',5
union select 'aa','p02',10
union select 'bb','p01',20
insert o select '1','aa',11
union select '1','bb',10
union select '2','aa',2
union select '3','aa',1
select oid,b.goods,lot,deli=(case when sq>sb then sb else sq end)-(case when sq-qty<sb-bal then sb-bal else sq-qty end)
from ( select *,sq=( select sum(qty)
from o
where oid <=a.oid and goods=a.goods
)
from o a
) b
join
( select *,sb=( select sum(bal)
from g
where goods=a.goods and lot<=a.lot
)
from g a
) c
on b.goods=c.goods and sq-qty<sb and sq>sb-bal
order by oid,b.goods,lot
drop table g,o
