VB.net SQL Combine two SQL Statements into one

Hi
I use the following two SQL Statements to get total amount invoiced to customers
and total amount paid by customers. results look like the table in the image.
How do I get the total balance (Amount Invoiced less Amount Paid) using one SQL
statement. What SQL statement would I use

Select [LINK ID] As CustomerID,SUM([AMOUNT]) As AMOUNT From Payments GROUP BY [LINK ID]
Select CustomerID, SUM([Inv Amt]) As AMOUNT From Invoices Group By CustomerID
Image1.jpg
Murray BrownMicrosoft Cloud Azure/Excel Solution DeveloperAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Kyle AbrahamsSenior .Net DeveloperCommented:
select
CustomerID, sum(amount) amount
from
 (
   select [Link ID] CustomerID, Amount from payments
   union all
   select customerId, [inv amt] from invoices
) SubQuery
group by CustomerID
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Murray BrownMicrosoft Cloud Azure/Excel Solution DeveloperAuthor Commented:
Great answer! Thanks very much
0
PortletPaulfreelancerCommented:
Just curious, but don't you deduct payments from invoices?

If I invoiced you $1,000 and you paid me $1,000, the outstanding amount is $0; NOT $2,000

Are you sure you just want to add all those values? Seems like a very curious figure that may have little or no meaning
 - it may even be misleading.
0
PortletPaulfreelancerCommented:
I have subsequently noticed you had a deleted question regarding "VB.net SQL Statement to show balance owed" this makes me even more concerned about the validity of just summing these numbers. Maybe this would help?

CustomerID, sum(amount) amount
from
 (
   select [Link ID] CustomerID, -Amount from payments --<< change this line to make the Amounts values negative
   union all
   select customerId, [inv amt] from invoices
) SubQuery
group by CustomerID
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Visual Basic.NET

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.