Sql 如何使用不同的where子句内部联接多个sum/group查询？

在下面的代码上使用

UNION

，将产生两列：

[运营商公司名称]

总和（总英亩）

对于每个

[运营商公司名称]

，由于5个查询，共有5条记录（行）

我如何正确地编写一个

联合

或

联接

，其中5个查询的结果都在一个独立的列中，然后它们都在

[运营商公司名称]

上联接，以便新的查询输出为每列1条记录和6列（共同名称+5个查询结果）

实际结果应包括每列1条记录和列

[运营商公司名称]

-其中所有查询都由

[总和（总英亩）]

[总和（英亩数）]

[总和（N英亩中）]

[总和（英亩数）]

[总和（半英亩）]

---

您应该能够使用条件聚合来解决这个问题

诀窍在于在每个

SUM（）

中使用

IIF

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

总和中考虑该值，否则应忽略该值

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];

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];