Question

我想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

但我遇到了这个错误

Blockquote＃1241 - 操作数应包含1列

Answer 1

我知道了，IN子句无法使用多个字段，我将查询更改为以下内容并解决了我的问题。

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

＃1241 - 操作数应包含1列：为什么？

1 个答案: