Question

在下面的代码上使用UNION会导致两列：

[Operator Company Name]
Sum(Gross Acres)

由于5个查询，每个[Operator Company Name]都有5条记录（行）。

如何正确编写一个UNION或JOIN，其中5个查询中的每一个的结果都在一个独立的列中，然后将它们全部合并到[Operator Company Name]上，以便新的查询输出为每列1条记录和6列（公司名称+ 5条查询结果）

SELECT [Operator Company Name],
Sum([Area (Gross Acres)]) AS [Sum(Gross Acres)]
FROM Enervus_PrivateData
WHERE [US Region] Like 'Permian'
GROUP BY [Operator Company Name];

union

SELECT [Operator Company Name],
Sum([Area (Gross Acres)]) AS [Sum(TX DEL Acres)]
FROM Enervus_PrivateData
WHERE [US Region] Like 'Permian' AND [COUNTY/PARISH] Like '*Reeves*' OR [COUNTY/PARISH] Like '*Culberson*' OR [COUNTY/PARISH] Like '*Pecos*' OR [COUNTY/PARISH] Like '*Loving*' OR [COUNTY/PARISH] Like '*Ward*' OR [COUNTY/PARISH] Like '*Winkler*'
GROUP BY [Operator Company Name];

union

SELECT [Operator Company Name],
Sum([Area (Gross Acres)]) AS [Sum(N MID Acres)]
FROM Enervus_PrivateData
WHERE [US Region] Like 'Permian' AND [COUNTY/PARISH] Like '*Dawson*' OR [COUNTY/PARISH] Like '*Borden*' OR [COUNTY/PARISH] Like '*Martin*' OR [COUNTY/PARISH] Like '*Howard*'
GROUP BY [Operator Company Name];

union

SELECT [Operator Company Name],
Sum([Area (Gross Acres)]) AS [Sum(NM DEL Acres)]
FROM Enervus_PrivateData
WHERE [US Region] Like 'Permian' AND [COUNTY/PARISH] Like '*Eddy*' OR [COUNTY/PARISH] Like '*Lea*'
GROUP BY [Operator Company Name];

union

SELECT [Operator Company Name],
Sum([Area (Gross Acres)]) AS [Sum(S MID Acres)]
FROM Enervus_PrivateData
WHERE [US Region] Like 'Permian' AND [COUNTY/PARISH] Like '*Midland*' OR [COUNTY/PARISH] Like '*Glasscock*' OR [COUNTY/PARISH] Like '*Upton*' OR [COUNTY/PARISH] Like '*Reagan*'
GROUP BY [Operator Company Name];

实际结果应在每列中包含1条记录

[Operator Company Name]-所有查询均由
[Sum(Gross Acres)]
[Sum(TX DEL Acres)]
[Sum(N MID Acres)]
[Sum(NM DEL Acres)]
[Sum(S MID Acres)]

Answer 1

您应该可以使用条件聚合解决此问题。

诀窍在于在每个IIF中使用一个SUM()语句，该语句保存来自相应原始子查询的条件。如果满足条件，则应在SUM中考虑该值，否则应将其忽略。

考虑：

SELECT 
    [Operator Company Name],
    Sum([Area (Gross Acres)]) AS [Sum(Gross Acres)],
    Sum(
        IIF( 
            (
                [COUNTY/PARISH] Like '*Reeves*' 
                OR [COUNTY/PARISH] Like '*Culberson*' 
                OR [COUNTY/PARISH] Like '*Pecos*' 
                OR [COUNTY/PARISH] Like '*Loving*' 
                OR [COUNTY/PARISH] Like '*Ward*' 
                OR [COUNTY/PARISH] Like '*Winkler*'
            ), 
            [Area (Gross Acres)],
            0
        )
    ) AS [Sum(TX DEL Acres)],
    Sum(
        IIF(
            (
                [COUNTY/PARISH] Like '*Dawson*' 
                OR [COUNTY/PARISH] Like '*Borden*' 
                OR [COUNTY/PARISH] Like '*Martin*' 
                OR [COUNTY/PARISH] Like '*Howard*'
            ),
            [Area (Gross Acres)],
            0
        )
    ) AS [Sum(N MID Acres)],
    Sum(
        IIF(
            (
                [COUNTY/PARISH] Like '*Eddy*' 
                OR [COUNTY/PARISH] Like '*Lea*'
            ),
            [Area (Gross Acres)],
            0
        )
    ) AS [Sum(NM DEL Acres)],
    Sum(
        IIF(
            (
                [COUNTY/PARISH] Like '*Midland*' 
                OR [COUNTY/PARISH] Like '*Glasscock*' 
                OR [COUNTY/PARISH] Like '*Upton*' 
                OR [COUNTY/PARISH] Like '*Reagan*'
            ),
            [Area (Gross Acres)],
            0
        )
    ) AS [Sum(S MID Acres)]
FROM Enervus_PrivateData
WHERE [US Region] Like 'Permian'
GROUP BY [Operator Company Name];

如何内部联接多个求和/组查询，每个查询具有不同的where子句？

1 个答案: