COUNT causes error in db2 from PHP

Question

When I run this query I get the following error:

Column MANUFACTURER or expression in SELECT list not valid.

The query runs fine if I remove the COUNT function.

Any ideas?

(this query is a bit of a mock so it might not make perfect sense)

SELECT
  MANUFACTURER
, PART_NUMBER
, COUNT(1) AS CNT
FROM 
( SELECT
    AWPART AS PART_NUMBER  
  , MANF AS MANUFACTURER       
  FROM STKMP                        
    INNER JOIN PRICING AS P         
      ON AWPART = P.JCPART  
      AND R.CODE = 1        
    WHERE  PART_NUMBER LIKE '%A2%') AS T 

Modifying the last line as follows produces the same effect.

WHERE  PART_NUMBER LIKE '%A2%') AS T  GROUP BY MANUFACTURER              

Answer 1

Typically COUNT() is only meaningful if you have a GROUP BY clause. Perhaps you meant to add this to the end (after the AS T ?):

GROUP BY MANUFACTURER, PART_NUMBER;