Could you help solving this query case statement when selecting from same table different type from one column and group by

Question

0.00/5 (No votes)

See more:

Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.

What I have tried:

SQL

select ( case TT when 'BTOS'
   then (SELECT DATEADD(WEEK,DATEDIFF(week,0,R_DATE),0)as Date,
         COUNT(*)as "OSCount" ,sum(amount) as "Gross OS",SUM(fee_amount) as "OS Fee",SUM(amount)-SUM(fee_amount) as "NetOS"
         from [TVDEV].[dbo].[TRN] group by DATEADD(WEEK,DATEDIFF(week,0,R_DATE),0) )
     when 'BTR' then 
     (SELECT DATEADD(WEEK,DATEDIFF(week,0,R_DATE),0)as Date, COUNT(*)as "RCount"
     ,SUM(amount)-SUM(fee_amount) as "R",NetOS-R as Deposit
      from [TVDEV].[dbo].[TRN]  group by DATEADD(WEEK,DATEDIFF(week,0,R_DATE),0))
     else null
     end) as TT
      
 from [TVDEV].[dbo].[TRN] where R_STATUS='R'

Posted 8-Sep-17 4:11am

Member 13400047

Updated 8-Sep-17 4:31am

Graeme_Grant

v2

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2017-09-08T04:23:00

Read the error message:

Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.

It's pretty clear.
One or more of your subqueries is returning more than one column. Specifically, this:

case TT when 'BTOS'
then (SELECT DATEADD(WEEK,DATEDIFF(week,0,R_DATE),0)as Date,
COUNT(*)as "OSCount" ,sum(amount) as "Gross OS",SUM(fee_amount) as "OS Fee",SUM(amount)-SUM(fee_amount) as "NetOS"

is returning multiple columns into what SQL thinks of as a single column. You can't do that.
And that whole query is weird: you appear to be trying to return different columns depending on row content, and that's just silly: if a row contains "BTOS" then return a column called OSCount, otherwise return a different column called "RCount"?

I'm not sure what problem you are trying to solve here, but that is most definitely not the way to do it.

Graeme_Grant · Answer 2 · 2017-09-08T04:31:00

This is advice when writing SQL statements... It helps to layout and correctly & consistently format your SQL to better see what is happening:

SQL

SELECT ( 
    CASE TT WHEN 'BTOS'
        THEN (
            SELECT DATEADD(week, DATEDIFF(week, 0, R_DATE), 0) as Date,
                   COUNT(*)as "OSCount",
                   SUM(amount) as "Gross OS",
                   SUM(fee_amount) as "OS Fee",
                   SUM(amount) - SUM(fee_amount) as "NetOS"
            FROM [TVDEV].[dbo].[TRN]
            GROUP BY DATEADD(week, DATEDIFF(week, 0, R_DATE), 0)
        )
        WHEN 'BTR' THEN  (
            SELECT DATEADD(week, DATEDIFF(week, 0, R_DATE), 0) as Date,
                   COUNT(*) as "RCount",
                   SUM(amount) - SUM(fee_amount) as "R",
                   NetOS-R as Deposit
            FROM [TVDEV].[dbo].[TRN]
            GROUP BY DATEADD(week, DATEDIFF(week, 0, R_DATE), 0)
        )
        ELSE
            null
    END) as TT
      
 FROM [TVDEV].[dbo].[TRN] where R_STATUS='R'

Could you help solving this query case statement when selecting from same table different type from one column and group by

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0