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Nested CASE statement with aggregate function

I am looking for a way to make the following select statement work. The problem is that I cannot use the field invno because I get the following error "is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause" Is there any other way to write this?

The first select state works fine. However, in this case I need to look at the first character of the invno to determine the company and that will then be the first part of getting the LEVEL.

This works perfectly
 
select Specno + '-' + spcompany + ' / ' + Project + ' / ' + spcontact as Order1, Count(*) as OrderCount, 
SUM(QtyShp) AS TotQty, Level=
CASE
	   	WHEN SUM(QtyShp) < 250 THEN 'A'
           	WHEN SUM(QtyShp) < 500 THEN 'B'
	   	WHEN SUM(QtyShp) < 1000 THEN 'C'
	   	WHEN SUM(QtyShp) < 5000 THEN 'D'
	   	WHEN SUM(QtyShp) < 10000 THEN 'E'
	   	ELSE 'F'
	   END 
From SBTInvoice 
where salesmn = 'aparker' 
Group by Specno + '-' + spcompany + ' / ' + Project + ' / ' + spcontact
 
 
This is the statement I want to work but it does not.
 
 
select Specno + '-' + spcompany + ' / ' + Project + ' / ' + spcontact as Order1, Count(*) as OrderCount, 
SUM(QtyShp) AS TotQty, Level=
CASE
	WHEN LEFT(invno,1) = '1' OR LEFT(invno,1) = '2' THEN
	   CASE  	
	   	WHEN SUM(QtyShp) < 250 THEN 'A'
           	WHEN SUM(QtyShp) < 500 THEN 'B'
	   	WHEN SUM(QtyShp) < 1000 THEN 'C'
	   	WHEN SUM(QtyShp) < 5000 THEN 'D'
	   	WHEN SUM(QtyShp) < 10000 THEN 'E'
	   	ELSE 'F'
	   END 
        ELSE
	   CASE  	
		WHEN SUM(QtyShp) < 25 THEN 'A'
		WHEN SUM(QtyShp) < 50 THEN 'B'
		WHEN SUM(QtyShp) < 100 THEN 'C'
		WHEN SUM(QtyShp) < 500 THEN 'D'
		WHEN SUM(QtyShp) < 1000 THEN 'E'
		ELSE 'F'
	   END 
     END 
From SBTInvoice 
where salesmn = 'aparker' 
Group by Specno + '-' + spcompany + ' / ' + Project + ' / ' + spcontact

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ASKER CERTIFIED SOLUTION

Woodz

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MikeToole

Split the second query into two Select statements with a where clause to distinguish between the two sets of data, and use a JOIN to concatenate the two results.

awking00

CASE
      WHEN (LEFT(invno,1) IN ('1','2') AND SUM(QtyShp) < 250)
OR (LEFT(invno,1) > '2' AND SUM(QtyShp) < 25) THEN 'A'
      WHEN (LEFT(invno,1) IN ('1','2') AND SUM(QtyShp) < 500)
OR (LEFT(invno,1) > '2' AND SUM(QtyShp) < 50) THEN 'B'
      WHEN (LEFT(invno,1) IN ('1','2') AND SUM(QtyShp) < 1000)
OR (LEFT(invno,1) > '2' AND SUM(QtyShp) < 100) THEN 'C'
      WHEN (LEFT(invno,1) IN ('1','2') AND SUM(QtyShp) < 5000)
OR (LEFT(invno,1) > '2' AND SUM(QtyShp) < 500) THEN 'D'
      WHEN (LEFT(invno,1) IN ('1','2') AND SUM(QtyShp) < 10000)
OR (LEFT(invno,1) > '2' AND SUM(QtyShp) < 1000) THEN 'E'
      ELSE 'F'
END

twestfall

ASKER

I changed invno in the group by to left(invno,1) and it worked perfectly.