Question

我正在使用SQL Server。我需要使用的公式是（Good-Bad）/ Total_Responses。 A是值，当值> = 9且Bad是<= 6时。

我的数据是：

DATE        Q1  Q2
2012-03-04   9   9
2012-03-04   8   8
2012-03-04   7   9
2012-03-04   4  NA
2012-03-04  10  10
2012-03-04   8   3
2012-03-04   3   4
2012-03-04   2   6
2012-03-04   6   8
2012-03-04  NA   6

我知道我将不得不使用“CASE WHEN ISNUMERIC（Q1）= 1”以确保它不使用NA值（它们存储为Nvarchar）

所以这个公式最终会成为（5-8）/18=-0.16666 总的来说，我试图让数据看起来像：

DATE        Promotor_Score
2012-03-04        -0.16666

谢谢！

Answer 1

这可以解决这个问题吗？

SELECT  Date,
        CAST((SUM(CASE WHEN ISNUMERIC(Q1) != 1 THEN 0
                 WHEN CAST(Q1 AS int) >= 9 THEN 1
                 WHEN CAST(Q1 AS int) <= 6 THEN -1
                 ELSE 0 END)
        + SUM(CASE WHEN ISNUMERIC(Q2) != 1 THEN 0
                 WHEN CAST(Q2 AS int) >= 9 THEN 1
                 WHEN CAST(Q2 AS int) <= 6 THEN -1
                 ELSE 0 END)) AS float)
        / (SUM(CASE WHEN ISNUMERIC(Q1) != 1 THEN 0
                   ELSE 1 END)
        + SUM(CASE WHEN ISNUMERIC(Q2) != 1 THEN 0
                   ELSE 1 END))
FROM    Questions
GROUP BY Date

或者，如果'NA'是唯一的非数字值，请明确测试它。

Answer 2

在@DavidM回答的基础上，我添加了浮点转换和Q2列感知：

SELECT [date], 
1e0 -- a float multiplier to avoid integer value
* SUM( 0
    -- get the positive, negative or neutral from q1
    + CASE WHEN ISNUMERIC(q1) != 1 THEN  0
    WHEN CAST(q1 AS int) >= 9    THEN  1
    WHEN CAST(q1 AS int) <= 6    THEN -1
    ELSE 0 END
    -- get the positive, negative or neutral from q2
    + CASE WHEN ISNUMERIC(q2) != 1 THEN  0
    WHEN CAST(q2 AS int) >= 9    THEN  1
    WHEN CAST(q2 AS int) <= 6    THEN -1
    ELSE 0 END
)
/ SUM( 0
    -- get the number of valid questions from q1
    + CASE WHEN ISNUMERIC(q1) != 1 THEN 0 ELSE 1 END        
    -- get the number of valid questions from q2
    + CASE WHEN ISNUMERIC(q2) != 1 THEN 0 ELSE 1 END
)
FROM Questions
GROUP BY Date;

SQL Server - 使用计数总和

2 个答案: