How to extract info based on the latest row

Question

I have two tables:-

TABLE A :-

ORNO  DEL   PONO    QTY
801   123   1       80
801   123   2       60
801   123   3       70
801   151   1               


        

Answer 1

select b.*, y.QTY
from
(
    select a.ORNO, a.PONO, MAX(a.DEL) [max]
    from @tA a
    group by a.ORNO, a.PONO
)x
join @tA y on y.ORNO = x.ORNO and y.PONO = x.PONO and y.DEL = x.max
join @tB b on b.ORNO = y.ORNO and b.PONO = y.PONO

Output:

ORNO        PONO        STATUS      ITEM       QTY
----------- ----------- ----------- ---------- -----------
801         1           12          APPLE      95
801         2           12          ORANGE     60
801         3           12          MANGO      75
802         1           22          PEAR       50
802         2           22          KIWI       55
802         3           22          MELON      30