Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Sum 2 Columns Subtract 2 Columns If Statement?

Posted on 2011-02-28
5
Medium Priority
?
1,023 Views
Last Modified: 2012-05-11
I would like to use the results "dif" to build If Statement. Unsure how to include ">= 0" into following code.
Could need Case statement?

[English]
If sum(col1) - sum(col2 >= 0 Then continue with other code, Else don't continue

if Exists (
Select Sum(Col1) - Sum(Col2) As [diff]
 From Products
 Where SalesMan = 'sales@mycompany.com'
 And ProductName = 'Laptop'
 Group By Col1, Col2
 )
--...continue with more code...


0
Comment
Question by:pointeman
5 Comments
 
LVL 28

Expert Comment

by:strickdd
ID: 35000797
IF (SUM(col1) - SUM(col2)) >= 0
BEGIN
   --Stuff to do here.
END
0
 
LVL 9

Accepted Solution

by:
joshbula earned 668 total points
ID: 35000815
Do the calculation in the WHERE statement:

Select * FROM Products
WHERE Sum(Col1) - Sum(Col2) >= 0 AND SalesMan = ....etc...
0
 
LVL 8

Assisted Solution

by:WesWilson
WesWilson earned 664 total points
ID: 35000857
IF (SELECT Sum(Col1) - Sum(Col2)
 FROM Products
 Where SalesMan = 'sales@mycompany.com'
 And ProductName = 'Laptop') >= 0
--do whatever
SELECT 1
ELSE
SELECT 2
0
 
LVL 19

Assisted Solution

by:billmercer
billmercer earned 668 total points
ID: 35000913
This: sum(col1) - sum(col2 )>= 0  is comparing two values and returning true or false based on which is bigger.
However this: if Exists ( Select Sum(Col1) - Sum(Col2) As [diff]...etc )
is checking to see if a record was returned, regardless of what the values are.

If you want to know if there are any records that match this criterion, wouldn't a where be more appropriate?

if exists ( Select *  From Products  Where SalesMan = 'sales@mycompany.com'
 And ProductName = 'Laptop'
and sum(col1) >= sum(Col2)
 Group By Col1, Col2 )

As an aside, if your goal is to only do something to records that have a certain value for diff, it would probably be more efficient to build a query that does what you need rather than using a cursor to move through records and test each one.  
 
0
 

Author Closing Comment

by:pointeman
ID: 35001301
ya, Where statement
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

An alternative to the "For XML" way of pivoting and concatenating result sets into strings, and an easy introduction to "common table expressions" (CTEs). Being someone who is always looking for alternatives to "work your data", I came across this …
When trying to connect from SSMS v17.x to a SQL Server Integration Services 2016 instance or previous version, you get the error “Connecting to the Integration Services service on the computer failed with the following error: 'The specified service …
This videos aims to give the viewer a basic demonstration of how a user can query current session information by using the SYS_CONTEXT function
Viewers will learn how to use the SELECT statement in SQL to return specific rows and columns, with various degrees of sorting and limits in place.

971 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