Alternative Filtering in SQL

Question

example:
table A : fields -->
company
order no
check status
total price
amount sell
table B : fields -->
company
store order no
store total price
store amount sell
please help me on how to solve, if system have to check on "check status" before filtering. if "check status" is '1', then retrieve fields from table B, else retrieve from table A. there are many companies, and different company have its "check status" (either '1' or '0'). thanks

Answer 1

Daphne,
you can try this with one query like
select a.company, decode(a.check_status,1,b.store_order_no,a.store_order_no) as ORDERNO,
decode(a.check_status,1,b.store_total_price,a.store_total_price) as TOTALPRICE,
decode(a.check_status,1,b.store_amount_sell,a.amount_sell) as AMOUNTSELL
from a, b
where a.company=b.company
regards
Rainer