Question

我有一张表格如下

column_date | color | qty | supplier | location
1 June 2012 | red   | 2   | XY       | A wing
1 June 2012 | red   | 1   | AB       | A wing
1 June 2012 | blue  | 4   | CD       | A wing
1 June 2012 | blue  | 1   | XY       | B wing
2 June 2012 | yellow| 13  | CD       | B wing
2 June 2012 | green | 45  | CD       | A wing
2 June 2012 | blue  | 32  | AB       | A wing
2 June 2012 | red   | 37  | XY       | A wing
2 June 2012 | red   | 2   | XY       | B wing
2 June 2012 | red   | 1   | AB       | A wing
2 June 2012 | blue  | 4   | CD       | A wing
3 June 2012 | red   | 1   | AB       | B wing
3 June 2012 | blue  | 4   | CD       | A wing
3 June 2012 | blue  | 1   | XY       | B wing
3 June 2012 | yellow| 13  | CD       | B wing
3 June 2012 | green | 45  | CD       | A wing
3 June 2012 | blue  | 32  | AB       | A wing

我希望得到如下的输出。我不确定它是否可以查询，我不知道如果可能的话我该如何开始。我正在寻找您的建议或可能的查询以显示这样的输出。谢谢。

                                    Supplier
Date           |        XY         |        CD          |       AB
               | A wing  | B wing  | A wing  | B wing   | A wing  | B wing
1 June 2012    |  2      |  1      |  4      | 0        | 1       | 0
2 June 2012    | 37      |  2      |  49     | 13       | 33      | 0
3 June 2012    | 0       |  1      |  49     | 13       | 32      | 1
Total          | 39      |  4      | 102     | 26       | 66      | 1

Answer 1

SELECT column_date,
    MAX(CASE WHEN supplier = 'XY' AND location = 'A wing' THEN qty END) AS 'XY A wing',
    MAX(CASE WHEN supplier = 'XY' AND location = 'B wing' THEN qty END) AS 'XY B wing',
    MAX(CASE WHEN supplier = 'CD' AND location = 'A wing' THEN qty END) AS 'CD A wing',
    MAX(CASE WHEN supplier = 'CD' AND location = 'B wing' THEN qty END) AS 'CD B wing',
    MAX(CASE WHEN supplier = 'AB' AND location = 'A wing' THEN qty END) AS 'AB A wing',
    MAX(CASE WHEN supplier = 'AB' AND location = 'B wing' THEN qty END) AS 'AB B wing'
FROM @t
GROUP BY column_date

DEMO

更新：您在这里寻找的是如何pivot您的列，但您的查询问题是没有聚合列，您可以聚合其他列，当您GROUP BY column_date。由于您需要GROUP BY column_date，因此其他列需要位于GROUP BY clause中或包含在聚合函数中。因此，我使用聚合函数MAX作为解决方法。如果你知道想要正确转动的值，这很好。但是，如果要转动未知或更改数量的值，则需要动态执行此操作。尝试在SQL Server中搜索动态数据透视，您会发现使用动态SQL的许多变通方法。例如，请参阅以下两篇文章：

寻找可能的查询来显示类似于sql server 2005中的数据透视表的输出

1 个答案:

DEMO