SQL question

Posted on 2001-08-12
Last Modified: 2011-09-20
Ok, I've got 2 tables: Customers.db and Orders.db
The fields I need to mention for each table are:

|| IdCustomer || Employer ||

|| IdCustomer || Price || NOfPayments || PaymentsAlreadyPayed

What I'm supposed to do is to print all the guys whose employer = 11 and add U$14 to their SUM(Price), EVEN IF THEY ARE NOT LISTED IN Orders.db, this means, even if they have not buyed anything.
Ahh, SUM(Price) is conditioned to PaymentsAlreadyPayed < NOfPayments, so here goes an example,

|| IdCustomer || Employer ||
1168                12
1169                11
1170                11  
1171                11
1172                13
1173                11
1174                11

|| IdCustomer || Price || NOfPayments || PaymentsAlreadyPayed
1168             21.00        5                   2
1169             12.50        6                   6
1169             20.00        4                   3
1669             50.00        3                   0
1170             75.00        4                   1
1171             25.00        6                   6
1171             35.00        3                   1

Output should be like this...

IdCustomer || SUM(Price)
1169             70 + 14 = 84
1170             75 + 14 = 89
1171             35 + 14 = 49
1173             0  + 14 = 14         // this guy is not in orders.db
1174             0  + 14 = 14         // this guy is not in orders.db

Please send SQL code.

thanks A LOT!!
Question by:pin_plunder
LVL 21

Expert Comment

ID: 6378612
select o.IdCustomer, SUM(o.Price)+14
from Orders o JOIN Customers c ON (o.IDCustomer=.IdCustomer)
where c.Employer=11 AND o.PaymentsAlreadyPayed < o.NOfPayments
GROUP BY IdCustomer
P.S. this Q should be in Databases topic

Accepted Solution

ntony earned 100 total points
ID: 6379426
try this is not very elegant but will do:

select o.idcustomer,sum(o.price)+14 price
from orders o,customers c
where o.idcustomer=c.idcustomer and c.employer=11 and o.NOfPayments>o.PaymentsAlreadyPayed
group by o.idcustomer
select idcustomer,14 as price
from customers
where idcustomer not in
(select idcustomer from orders) and employer=11

Author Comment

ID: 6382701
Your code worked just as I wanted to.
THANKS for your help. And thanks Zoilko too.


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