＃1242 - 子查詢返回多個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 

這是我的查詢，但拋出。可以任何機構幫助錯誤感謝

這裏有三個表？

1. tbluser
2. tblorder
3. tblordereditems

tbluser的領域fld_id是外鍵tblorder爲fld_userid。
tblorder的fld_id是tblordereditems的外鍵，因爲fld_order_id，我得到的結果fld_userid訂購了超過5個數量的產品，即。 fld_product_quantity的總和由tblorder.fld_userid分組它們：

Answer 1

由於您請求所有用戶的數量，它會超過1行。

嘗試：

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