Solved

tsql, multiplying two columns to create a new column

Posted on 2012-12-20
6
542 Views
Last Modified: 2012-12-20
I struggled through making this query.  Now I'm trying to create a new field by multiplying two fields but am not able to make it work.
This works:
SELECT Guest.RegistrationID2, Registration.RegistrationID2, StudentID, FirstName, LastName, PreferredName, StudentEmail, MailAddress1, MailAddress2, MailCity, MailState, MailZip, CommunicationPreference, IsActive, ApplicationIDPrimary, Sum(CPSTransaction.AuthorizationAmount) as Total_Paid, COUNT(Guest.GuestRegID) as Guests
FROM Registration Left Join CPSTransaction ON StudentID= ApplicationIDPrimary LEFT JOIN Guest ON Registration.RegistrationID2 = Guest.RegistrationID2
WHERE IsActive = 'True' AND (CommunicationPreference = 'Email') 
Group by Guest.GuestRegID, Guest.RegistrationID2, Registration.RegistrationID2, Registration.StudentID, CPSTransaction.AuthorizationAmount, FirstName, LastName, PreferredName, StudentEmail, MailAddress1, MailAddress2, MailCity, MailState, MailZip, CommunicationPreference, IsActive, ApplicationIDPrimary
Order by SUM(AuthorizationAmount), COUNT(Guest.GuestRegID)

Open in new window


When I add this line to the select statement, I break it.
SUM(CPSTransaction.AuthorizationAmount - ((55 * COUNT(Guest.GuestRegID) + 100))) as Total_Due

Error:
Cannot perform an aggregate function on an expression containing an aggregate or a subquery.


I would appreciate any help with this.
Thanks.
0
Comment
Question by:javierpdx
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
  • 2
6 Comments
 
LVL 61

Expert Comment

by:mbizup
ID: 38711411
What exactly are you trying to do?

Your question title mentions multiplying two columns, but the expression that you are having trouble with is not multiplying them.

>>> SUM(CPSTransaction.AuthorizationAmount - ((COUNT(Guest.GuestRegID) * 50) + 100)

Should the minus sign be a multiplication sign?


SUM(CPSTransaction.AuthorizationAmount)  * COUNT(Guest.GuestRegID) * 50 + 100
0
 
LVL 69

Expert Comment

by:Qlemo
ID: 38711420
You will have to transform the formula to use no aggregates in aggregates. Sum(count()) is the issue.
0
 
LVL 69

Expert Comment

by:Qlemo
ID: 38711438
The formula does not make sense to me. Arithemetic transformation leads to
  sum(CPSTransaction.AuthorizationAmount)
 + count(*)*100
 + count(Guest.GuestRegID)*count(*)*55
which doesn't look reasonable.
0
SharePoint Admin?

Enable Your Employees To Focus On The Core With Intuitive Onscreen Guidance That is With You At The Moment of Need.

 

Author Comment

by:javierpdx
ID: 38711574
Sorry for the confusion.

I'm trying to multiple COUNT(Guest.GuestRegID) by 55, then add 100 to it.
Then subtract this value from Sum(CPSTransaction.AuthorizationAmount) to get the total still due.

Thanks.
0
 
LVL 61

Accepted Solution

by:
mbizup earned 500 total points
ID: 38711587
Try this:

Sum(CPSTransaction.AuthorizationAmount) - (COUNT(Guest.GuestRegID) * 55 + 100)

Open in new window


Your parentheses were originally in the wrong place.
0
 

Author Closing Comment

by:javierpdx
ID: 38711671
Thanks so much!  Worked great.

I will post a follow up question in a new thread.
0

Featured Post

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Describes a method of obtaining an object variable to an already running instance of Microsoft Access so that it can be controlled via automation.
It’s been over a month into 2017, and there is already a sophisticated Gmail phishing email making it rounds. New techniques and tactics, have given hackers a way to authentically impersonate your contacts.How it Works The attack works by targeti…
Familiarize people with the process of utilizing SQL Server functions from within Microsoft Access. Microsoft Access is a very powerful client/server development tool. One of the SQL Server objects that you can interact with from within Microsoft Ac…
Using Microsoft Access, learn some simple rules for how to construct tables in a relational database. Split up all multi-value fields into single values: Split up fields that belong to other things into separate tables: Make sure that all record…

726 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question