＃1242 - 子查询返回多个1行

Question

SELECT tblorder.fld_userid 
FROM `tblordereditems` 
inner JOIN tblorder ON tblorder.fld_id = tblordereditems.fld_order_id 
where (SELECT sum(tblordereditems.fld_product_quantity)FROM tblordereditems inner JOIN tblorder ON tblorder.fld_id =tblordereditems.fld_order_id GROUP BY tblorder.fld_userid)>5 

这是我的查询，但抛出。可以任何机构帮助错误感谢

这里有三个表？

1. tbluser
2. tblorder
3. tblordereditems

tbluser的领域fld_id是外键tblorder为fld_userid。
tblorder的fld_id是tblordereditems的外键，因为fld_order_id，我得到的结果fld_userid订购了超过5个数量的产品，即。 fld_product_quantity的总和由tblorder.fld_userid分组它们：

Answer 1

由于您请求所有用户的数量，它会超过1行。

尝试：

Select tb1.fld_userid 
FROM `tblordereditems` tbi1 
inner JOIN tblorder tb1 ON tb1.fld_id = tbi1.fld_order_id 
where (
     SELECT sum(tbi2.fld_product_quantity) 
     FROM tblordereditems tbi2 inner JOIN tblorder tb2 ON tb2.fld_id =tbi2 .fld_order_id 
     where tb2.fld_userid = tb1.fld_userid 
)>5