列出客戶的名字，姓氏和花費總金額（注意：花費的金額是訂單小計+稅金+從tblorder表中發貨的成本）。Mysql select總計和名稱
我有這樣的代碼（但值都出來一樣：
Select CONCAT(firstname, ' ' ,lastname) as name, sum(ordersubtotal + ordertax + ordershipcost) as AmountSpent
From tblorder,tblcust
group by name
這應做到：
Select CONCAT(firstname, ' ' ,lastname) as name, sum(ordersubtotal + ordertax + ordershipcost) as AmountSpent
From tblorder a
inner join tblcust b ON a.custId=b.custId
group by name;
你沒你是什麼定義加入表格
在您的代碼風格，將是：
Select CONCAT(firstname, ' ' ,lastname) as name, sum(ordersubtotal + ordertax + ordershipcost) as AmountSpent
From tblorder a,tblcust b
where a.custId=b.custId
group by name;
（兩者應該給予同樣的結果）
嘗試把你的表之間的連接條件。作爲一條規則：不要在'from'子句中使用逗號。始終使用明確的「加入」。 – 2015-04-02 03:11:04
idk要加入的是它的名稱和custid？ – runlax 2015-04-02 03:15:54