如何使內部連接兩次單表中的SQL Server

我在SQL Server中的兩個表爲如何使內部連接兩次單表中的SQL Server

City_Master(
ID bigint, 
Name nvarchar(50) 
) 
Tour_Details(
ID bigint, 
From_City bigint, 
To_City bigint, 
Details nvarchar(max), 
Cost nvarchar(100), 
Tour_Name nvarchar(100), 
Duration nvarchar(max))

在Tour_Details表FROM_CITY和TO_CITY列從City_Master表來。我想選擇位於Tour_Details Table的From_City和To_City列中的城市名稱。

我用下面這個

SELECT Tour_Details.ID, Tour_Details.Tour_Name, Tour_Details.From_City, Tour_Details.To_City, Tour_Details.Cost, 
    Tour_Details.Details,Tour_Details.Duration, City_Master.Name as City FROM Tour_Details INNER JOIN 
    City_Master ON Tour_Details.From_City = City_Master.ID ORDER BY Tour_Details.ID DESC

SQL查詢，但它返回只有一個城市名稱，但也存在於tour_Details表列作爲FROM_CITY，TO_CITY兩市ID。我想這兩個名字cities.Please誰能幫助我

來源

2014-06-28 Sunny Sandeep

試試這個

SELECT Tour_Details.ID, Tour_Details.Tour_Name, Tour_Details.From_City, Tour_Details.To_City, Tour_Details.Cost, 
Tour_Details.Details,Tour_Details.Duration, B.Name as FromCityName, A.Name as ToCityName 
FROM Tour_Details 
INNER JOIN City_Master B ON B.ID = Tour_Details.From_City 
INNER JOIN City_Master A ON A.ID = Tour_Details.To_City 
ORDER BY Tour_Details.ID DESC

來源

2014-06-28 07:08:21

先生，這個查詢有點不對勁，而內部聯接，因爲FROM_CITY和TO_CITY是因爲你已經證明Tour_Details表不City_Master的列在上面的查詢中。 –

@SunnySandeep，對不起...糾正 –

仍然是不正確的。我自己做的正確如下：SELECT Tour_Details.ID，Tour_Details.Tour_Name，Tour_Details.From_City，Tour_Details.To_City，Tour_Details.Cost， Tour_Details.Details，Tour_Details.Duration，B.Name as FromCityName，A.Name as ToCityName FROM Tour_Details INNER JOIN City_Master B開B.ID = Tour_Details.From_City INNER JOIN City_Master A ON A.ID = Tour_Details.To_City ORDER BY Tour_Details.ID DESC –

如何使內部連接兩次單表中的SQL Server

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