COUNT从PHP导致db2中出现错误

Question

当我运行此查询时，出现以下错误：

Column MANUFACTURER or expression in SELECT list not valid.

如果删除COUNT函数，查询运行正常。

有任何想法吗？

（此查询有点儿模拟，因此可能不太合理）

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 

如下修改最后一行会产生相同的效果。

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

Answer 1

通常， COUNT()仅在您具有GROUP BY子句时才有意义。 也许您打算将其添加到末尾（在AS T ？）：

GROUP BY MANUFACTURER, PART_NUMBER;