mysql - 全外连接SQL错误jj

Question

考虑:

Select Dash_Bill_ID As 'رقم الفاتورة',
       c2.Customer_Name As 'العميل',
       c1.Customer_Name As 'المهندس/المقاول',
       delegate.Delegate_Name As 'المندوب',
       Total_CostBD As 'الاجمالي قبل الخصم',
       Total_CostAD As 'الاجمالي بعد الخصم',
       Bill_Date As 'التاريخ',
       Type_Buy As 'طريقة الدفع',
       Initial_Value As 'العربون',
       bank.Bank_Name As 'الخزنة'
From   customer_bill
Full Outer Join customer As c1
    On c1.Customer_ID = customer_bill.Customer_ID
Full Outer Join customer As c2
    On c2.Customer_ID = customer_bill.Client_ID
Full Outer Join delegate
    On delegate.Delegate_ID = customer_bill.Delegate_ID
Full Outer Join bank
    On bank.Bank_ID = customer_bill.Bank_ID
Where  Dash_Bill_ID = 24;

我收到错误:

[Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'outer join customer as c1 on c1.Customer_ID=customer_bill.Customer_ID full outer' at line 1

Answer 1

MySQL 不支持 FULL JOIN，这是您遇到的具体问题。

但是，完全不可能需要 FULL JOIN。在结构良好的数据库中，几乎不需要完全连接。假设 customer_bill 中所有引用的字段均非 NULL，则 INNER JOIN 应该没问题。或者，您可能需要LEFT JOIN。