COUNT 在 PHP 的 db2 中导致错误
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，查询将正常运行。
有什么想法吗？
（此查询有点模拟，因此可能没有完全意义）
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
按如下方式修改最后一行会产生相同的效果。
WHERE PART_NUMBER LIKE '%A2%') AS T GROUP BY MANUFACTURER
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
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评论（1）
通常，只有当您有 GROUP BY 子句时，
COUNT()才有意义。也许您想将其添加到末尾（在AST之后？）：Typically
COUNT()is only meaningful if you have aGROUP BYclause. Perhaps you meant to add this to the end (after theAS T?):