组合查询会显示不正确的结果

Question

为代码的大片段道歉，但我需要显示它们以显示我编译的相关调查。

下面我有两个单独的查询，一个是从登台架构（Staging.SabreAssignedCrew）表中检查特定航班中的机组成员，另一个是数据的比较模式表，在将所有相关表连接在一起后，我得到每个航班的机组信息：

Staging.SabreAssignedCrew表

SELECT 
*
, Airline + CAST(FlightNumber AS VARCHAR) + Suffix AS StagingFlight 
, ROW_NUMBER() OVER(PARTITION BY Airline + CAST(FlightNumber AS VARCHAR) + Suffix  ORDER BY UpdateId DESC) AS StageRowNumber
FROM Staging.SabreAssignedCrew
WHERE Airline + CAST(FlightNumber AS VARCHAR) + Suffix = 'LS627' AND DepartureDate = '2016-09-04'

Data架构表

SELECT 
cd.CrewUpdateID
, cd.IsPassive
, cd.CrewBase
, cd.CrewCategory
, cd.CrewType
, cd.EmployeeNumber
, cd.FirstName
, cd.LastName
, c.UpdateID
, c.LegKey
, c.UpdateReceived
, DataFlight
, l.ScheduledDepartureDate
, l.ScheduledDepartureAirport
FROM 
(SELECT *, ROW_NUMBER() OVER(PARTITION BY LegKey ORDER BY UpdateID DESC) AS RowNumber FROM Data.Crew) c
INNER JOIN 
Data.CrewDetail cd
ON c.UpdateID = cd.CrewUpdateID
AND cd.IsPassive = 0
AND RowNumber = 1
INNER JOIN 
(SELECT *, Carrier + CAST(FlightNumber AS VARCHAR) + Suffix AS DataFlight FROM Data.Leg) l
ON c.LegKey = l.LegKey
WHERE DataFlight = 'LS627' AND ScheduledDepartureDate = '2016-09-04'

两个查询的结果显示飞行中有6名机组成员（6行）：

现在我要做的是将查询合并到一个使用并执行SUM以确保正确的机组成员在飞行中。但是，结果不正确，因为它输出如下：

我们知道该航班上有6名机组人员，因此应显示登台架构2 StagingCabinCrew和4 StagingCockpitCrew以及<的完全相同的值强>数据架构。这完全取决于登台和数据架构表中的CrewType字段。

我假设我在组合查询中做错了但是我不确定它是什么，因为在组合查询中单独运行上面提到的两个查询会显示正确的结果，但执行整个组合查询会显示错误的值。需要修复什么？

WITH CTE AS (
SELECT 
cd.CrewUpdateID
, cd.IsPassive
, cd.CrewBase
, cd.CrewCategory
, cd.CrewType
, cd.EmployeeNumber
, cd.FirstName
, cd.LastName
, c.UpdateID
, c.LegKey
, c.UpdateReceived
, DataFlight
, l.ScheduledDepartureDate
, l.ScheduledDepartureAirport
FROM 
(SELECT *, ROW_NUMBER() OVER(PARTITION BY LegKey ORDER BY UpdateID DESC) AS RowNumber FROM Data.Crew) c
INNER JOIN 
Data.CrewDetail cd
ON c.UpdateID = cd.CrewUpdateID
AND cd.IsPassive = 0
AND RowNumber = 1
INNER JOIN 
(SELECT *, Carrier + CAST(FlightNumber AS VARCHAR) + Suffix AS DataFlight FROM Data.Leg) l
ON c.LegKey = l.LegKey
WHERE DataFlight = 'LS627' AND ScheduledDepartureDate = '2016-09-04'
)
SELECT
StagingFlight
, sac.DepartureDate
, sac.DepartureAirport
, cte.DataFlight
, cte.ScheduledDepartureDate
, cte.ScheduledDepartureAirport
, SUM(CASE WHEN sac.CREWTYPE = 'F' THEN 1 ELSE 0 END) AS StagingCabinCrew
, SUM(CASE WHEN sac.CREWTYPE = 'C' THEN 1 ELSE 0 END) AS StagingCockpitCrew
, SUM(CASE WHEN cte.CrewType = 'F' THEN 1 ELSE 0 END) AS DataCabinCrew
, SUM(CASE WHEN cte.CrewType = 'C' THEN 1 ELSE 0 END) AS DataCockpitCrew
FROM 
(
SELECT 
*
, Airline + CAST(FlightNumber AS VARCHAR) + Suffix AS StagingFlight 
, ROW_NUMBER() OVER(PARTITION BY Airline + CAST(FlightNumber AS VARCHAR) + Suffix  ORDER BY UpdateId DESC) AS StageRowNumber
FROM Staging.SabreAssignedCrew--
WHERE Airline + CAST(FlightNumber AS VARCHAR) + Suffix = 'LS627' AND DepartureDate = '2016-09-04') 
sac

LEFT JOIN CTE cte
ON StagingFlight = DataFlight
AND sac.DepartureDate = cte.ScheduledDepartureDate
AND sac.DepartureAirport = cte.ScheduledDepartureAirport
AND sac.CREWTYPE = cte.CrewType
WHERE StagingFlight = 'LS627' AND DepartureDate = '2016-09-04' AND StageRowNumber = 1

GROUP BY 
StagingFlight
, sac.DepartureDate
, sac.DepartureAirport
, cte.DataFlight
, cte.ScheduledDepartureDate
, cte.ScheduledDepartureAirport

Answer 1

1. 为stagingflight创建列（您可能会使用apropriete索引）。请始终设置varchar的大小（例如varchar - ＆gt; varchar（30））。

   alter table staging.sabreassignedcrew 
   add stagingflight as cast(airline + cast(flightnumber as varchar(5)) + suffix as varchar(25)) persisted
   

2. 创建视图。

   CREATE VIEW Staging.vw_SabreAssignedCrewCount
   AS
   SELECT 
       StagingFlight, 
       DepartureDate, 
       COUNT(DISTINCT CASE WHEN sac.CREWTYPE = 'F' THEN EmployeeNumber END) AS StagingCabinCrewCnt,
       COUNT(DISTINCT CASE WHEN sac.CREWTYPE = 'C' THEN EmployeeNumber END) AS StagingCockpitCrewCnt
   FROM Staging.SabreAssignedCrew
   GROUP BY StagingFlight, DepartureDate 
   

第二张表的第二个视图。

1. 你不需要rownumbers，CTE。只能轻松加入2个分组选择。