Php 1241-操作数应包含1列：为什么？

我希望在主查询中使用子查询，如下所示：

SELECT distinct(cnt.crid),cu.companyName,m.*,cnt.*,m.submitDate as mSubmitDate 
from tbl_mahmoleh m,tbl_customer cu,tbl_cntreserve cnt 
where m.cuID=cu.cuID and m.mBLID=cnt.mBLID and m.cuID='12' 
      and (cnt.crID IN (SELECT DISTINCT(crID) FROM tbl_paymentcnt)) 
      and (cnt.crID IN (SELECT pc.crID, SUM( amount ) AS PaySum 
                        FROM tbl_paymentcnt pc GROUP BY pc.crID HAVING PaySum < '2000'))
ORDER BY inputDateD

但我面临着这个错误

块引号1241-操作数应包含1列

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我明白了，IN子句不能处理多个字段，我将查询改为以下内容，我的问题就解决了

SELECT DISTINCT(cnt.crid),cu.companyName,m.*,cnt.*,m.submitDate AS mSubmitDate 
FROM tbl_mahmoleh m,tbl_customer cu,tbl_cntreserve cnt 
WHERE m.cuID=cu.cuID AND m.mBLID = cnt.mBLID AND m.cuID = '12' 
AND (cnt.crID IN (SELECT DISTINCT(crID) FROM tbl_paymentcnt)) 
AND (cnt.crID IN (SELECT pc.crID FROM tbl_paymentcnt pc GROUP BY pc.crID HAVING SUM(amount) < '2500')) 
ORDER BY inputDateD

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最后一个ORDER BY应该是主SELECT，但是我在SELECT列表中没有看到任何名为INPUTTATED的列，因为in需要一个列表，即值列。两个是没有意义的。将SUMamount移到WHERE，而不是have。可能重复的inputDateD是tbl_mahmoleh中的一个字段，