Question

数据库是SQL Server，我有这个表：

NODE |   Param1   |   Param2   |   Param3   |   Param4   |   Param5   |
-----------------------------------------------------------------------
node1| some value | some value | some value | some value | some value |
node2| some value | some value | some value | some value | some value |
node3| some value | some value | some value | some value | some value |
node4| some value | some value | some value | some value | some value |

我试图像这样转置它：

PARAM |    node1   |    node2   |    node3   |    node4   |
-----------------------------------------------------------
Param1| some value | some value | some value | some value |
Param2| some value | some value | some value | some value |
Param3| some value | some value | some value | some value |
Param4| some value | some value | some value | some value |
Param5| some value | some value | some value | some value |

我正在尝试使用PIVOT，但无法使其成为正确的方式

如果我使用它：

SELECT
    * 
FROM
    (SELECT
        NODE ,
        Param1 
    FROM
        My_Table 
    ) TEMP 
PIVOT 
( 
MAX(Param1) FOR NODE IN (node1, node2, node3, node4) 
) PIV

然后它仅转置一行

Answer 1

您应该尝试修复表格结构。无论如何，这是使用条件聚合的一种方法。

SQL Fiddle

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如何在sql中转置表

1 个答案: