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Question

我有一个正面和正面的专栏负数。是否可以将Col1中的所有正数与Col2中的负数和Col3中的（Col1-Col2）相加。然后按最后一个Col。

排序

    Current table         New Table
    ID Score              ID   Pos  Neg   Diff            
    1   3                  3    5     0     5
    1   1                  1    4     1     3
    1  -1                  2    2     1     1
    2   1
    2  -1
    2   1
    3   3
    3   1
    3   1

这给了我总数，但我也想列出Pos和Neg数字。

SELECT ID, SUM(Score) as total FROM results 
GROUP BY ID ORDER BY total DESC

Answer 1

只需使用带有单独条件聚合的标准数据透视查询，即正数和负数。

SELECT
    ID,
    SUM(CASE WHEN Score >= 0 THEN Score    ELSE 0 END) AS Pos,
    SUM(CASE WHEN Score <  0 THEN -1*Score ELSE 0 END) AS Neg,
    SUM(Score) AS Diff
FROM results
GROUP BY ID
ORDER BY ID

mysql表正数和负数的总和

1 个答案:

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