#1241 - Operand should contain 1 column(s): why?

Question

i want use a subquery in a main query like following:

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

but i faced by this error

Blockquote #1241 - Operand should contain 1 column(s)

Answer 1

i got it, the IN clause can't work with more than one field, i changed my Query to the following and my Problem was solved.

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