使用CREATE VIEW與多個表

Question

我試圖使用CREATE VIEW以及來自3個不同表格的兩個單元格之間的乘法的多個單元格。在某個地方有一個語法錯誤，但我似乎無法識別它。

CREATE VIEW ORDERS AS CustFirstname, CustLastName, o.Ordernumber AS OrderNumber, 
o. OrderDate AS OrderDate, o.ShipDate AS ShipDate, c.QuotedPrice, 
c.QuantityOrdered, c.QuotedPrice * c.QuantityOrdered AS ItemTotal FROM Customers 
NATURAL JOIN Orders o NATURAL JOIN Order_Details c 

我想要得到的輸出是 | CustFirstname | CustLastName |訂單號碼|訂購日期|並按ShipDate | ItemTotal |

更新：如果我取代「CREATE VIEW訂單AS」與「選擇」，似乎工作

Answer 1

在您CREATE VIEW聲明你缺少查詢的SELECT：

CREATE VIEW ORDERS AS 
    SELECT CustFirstname, CustLastName, o.Ordernumber AS OrderNumber, 
     o. OrderDate AS OrderDate, o.ShipDate AS ShipDate, c.QuotedPrice, 
     c.QuantityOrdered, c.QuotedPrice * c.QuantityOrdered AS ItemTotal 
    FROM Customers NATURAL JOIN Orders o NATURAL JOIN Order_Details c 

論CREATE VIEW的定義，你可以看到一個select_statement要求：

CREATE 
    [OR REPLACE] 
    [ALGORITHM = {UNDEFINED | MERGE | TEMPTABLE}] 
    [DEFINER = { user | CURRENT_USER }] 
    [SQL SECURITY { DEFINER | INVOKER }] 
    VIEW view_name [(column_list)] 
    AS select_statement 
    [WITH [CASCADED | LOCAL] CHECK OPTION] 

你可以在上找到有關CREATE VIEW的更多信息。

Answer 2

你缺少了最重要的說法是「選擇」。

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