SQL 服务器中带有查询结果的新列

Question

我需要添加带有查询结果的新列。

我有这个查询：

    SELECT DISTINCT Arrival                              
           , Flight                                         
           , TotalPax.SumPassengers            
           , TotalPaxLocal.SumLocalPassengers  
           , STD                                         
           , STA                                         
           --, PassengerID                       
           --, Departure                     
           --, JourneyNumber
           --, SegmentNumber
           --, LegNumber           
           --, InventoryLegKey  
           --, RecordLocator
        FROM #TempLocalOrg tmp

    CROSS APPLY
    (
       SELECT COUNT(1) AS SumPassengers
            FROM #TempLocalOrg crossTemp
       WHERE tmp.Flight = crossTemp.Flight

    ) TotalPax 

    CROSS APPLY
    (
       SELECT COUNT(1) AS SumLocalPassengers
            FROM #TempLocalOrg crossTemp
       WHERE tmp.Flight        = crossTemp.Flight           
         AND tmp.Arrival       = crossTemp.Arrival
         AND tmp.SegmentNumber = 1
         AND tmp.LegNumber     = 1
    ) TotalPaxLocal

TotalPax 正在运行，但是 TotalPaxLocal 不运行，我需要交叉应用或类似下面的查询：

    SELECT Count(*) 
        FROM #TempLocalOrg
     WHERE Flight        = 1500 
       AND Arrival       = 'FLN'
       AND SegmentNumber = 1
       AND LegNumber     = 1

所以，我需要为这个查询替换 Cross Apply TotalPaxLocal。

错误的输出：

Arrival | Flight | TotalPax | TotalPaxLocal | ETD              | ETA
--------|--------|----------|---------------|------------------|----------------    
FLN     | 1500   | 144      | 144           | 05/22/2015 08:25 | 05/22/2015 09:35

正确的输出：

Arrival | Flight | TotalPax | TotalPaxLocal | ETD              | ETA
--------|--------|----------|---------------|------------------|----------------    
FLN     | 1500   | 144      | 52            | 05/22/2015 08:25 | 05/22/2015 09:35

Answer 1

只需使用 window 函数进行这些计算：

SELECT DISTINCT tmp.Arrival, tmp.Flight,
       COUNT(*) OVER (PARTITION BY Flight) as NumPassengers, 
       SUM(CASE WHEN SegmentNumber = 1 AND LegNumber = 1 THEN 1 ELSE 0 END) OVER
           (PARTITION BY Flight, Arrival)
          ) as NumLocalPassengers,
       STD, STA   
FROM #TempLocalOrg tmp;

SQL 服务器中带有查询结果的新列

New Column with query result in SQL Server

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