無法使用查詢創建表格

Question

我正在嘗試編寫一個查詢來選擇此視圖。

CREATE VIEW 
    CarRentalHistoryView 
AS 
    SELECT 
     c.vehNo, 
     c.brand, 
     c.dateRegistered, 
     c.purchasePrice, 
     c.rentalCost, 
     c.condition as 'Before Condition', 
     r.condition as 'After Condtion', 
     r.dateRented, 
     r.dateReturned, 
     r.CustNo,cu.name, 
     cu.id, 
     cu.dateOfBirth 
    FROM 
     dbo.Car c 
    Inner JOIN 
     dbo.Rental AS r 
    ON 
     c.VehNo = r.VehNo 
    Inner JOIN 
     dbo.Customer as cu 
    on 
     cu.CustNo = r.CustNo; 
GO 

這是我試圖運行查詢，

Select 
    * 
From 
    dbo.CarRentalHistoryView 
Where 
    'Before Condition' != 'After Condition' 

但查詢運行良好，即使是這種情況

Select 
    * 
From 
    dbo.CarRentalHistoryView 
Where 
    'Before Cion' != 'After Ction' 

所以我的觀點是怎麼樣，我可以確保我可以得到與以前不同的車輛結果。 TKS！

Answer 1

單引號（'）表示字符文字。方括號（[]）表示列名稱。所以，你的看法創作應該是這樣的：

CREATE VIEW CarRentalHistoryView 
AS 
SELECT c.vehNo, c.brand, c.dateRegistered, c.purchasePrice, c.rentalCost, 
     c.condition as [Before Condition], 
     r.condition as [AfterC ondtion],  
     r.dateRented, r.dateReturned, r.CustNo, 
     cu.name, cu.id, cu.dateOfBirth 
FROM dbo.Car c 
Inner JOIN dbo.Rental AS r ON c.VehNo = r.VehNo 
Inner JOIN dbo.Customer as cu on cu.CustNo = r.CustNo ; 
GO 

現在，你可以適當地查詢它：

SELECT * 
FROM dbo.CarRentalHistoryView 
WHERE [Before Condition] != [After Condition]