如何顯示結果查詢列，而不是逐行顯示？

Question

我有三個表：

Flight table 
FlightId int 
FlightNumber varchar(10) 

FlightCapacity table 
ID int 
FlightIdRef int 
ClassIdRef int 
Capacity int 

Class Table 
ClassId int 
Name  varchar(10) 

Class Table: 
ClassId  Name 
    1   Y 
    2   A 

Flight Table 
FlightId Number 
1   123 
2   423 

FlightCapacity Table 
Id FlightIdRef ClassIdref Capacity 
1  1    1   10 
2  1    2   20 
3  2    2   10 

這是一個簡單的查詢：

select Flight.FlightNumber,Class.Name+RTRIM(FlightCapacity.Capacity) 
    from Flight 
     inner join FlightCapacity 
      on Flight.FlightId=FlightCapacity.FlightIdRef 
       inner join Class 
        on FlightCapacity.ClassIdRef=Class.ClassId 

，但我想下面的結果：（我想顯示在一個單列每次飛行和能力的所有類）

FlightNumber  ClassNameAndCapacity 
    123     Y10 A20 
    423     Y10 

Answer 1

;WITH x(fn,cn) AS 
(
    SELECT f.FlightNumber, c.Name + RTRIM(fc.Capacity) 
    FROM dbo.Flight AS f 
    INNER JOIN dbo.FlightCapacity AS fc 
    ON f.FlightId = fc.FlightIdRef 
    INNER JOIN dbo.Class AS c 
    ON fc.ClassIdRef = c.ClassId 
) 
SELECT DISTINCT 
    FlightNumber = fn, 
    ClassNameAndCapacity = (SELECT cn + ' ' 
     FROM x AS x2 
     WHERE x2.fn = x.fn 
     FOR XML PATH('') 
    ) 
FROM x 
ORDER BY FlightNumber;