Question

我在SQL语句中遇到SUM问题。我使用的是MSSQL 2014版本和Management Studio版本12.0.2000.8。

我试图根据他们的比例贡献和总收入的60％从表中获得每个人的股息。每当我使用SUM（TotalShares）时，我都会让所有股东拥有相同的股息（总股息），如图所示

    SELECT Names, MemGrpID, GtotalIncome, TotalShares, (GTotalIncome*0.6)*
    ((TotalShares)/SUM(TotalShares)) AS Dividends FROM tblDivedends GROUP BY 
    Names, MemGrpID, GTotalIncome, TotalShares

当我执行上述操作时，我只能使用相同的股息（总股息）获得每个名称，这是错误的。

**Names               MemGrpID      GTotalIncome   TotalShares  Dividends**
*Kevin Onyango Otieno  8484         30260.97       8000         18456.582000
*Paul Anam Otieno     6060          30260.97       5000         18456.582000
*Simon Kimani         8526          30260.97       1000         18456.582000

但是，如果只是直接或手动输入TotalShares的数字（即14000），我得到正确的分配。

    SELECT Names, MemGrpID, GtotalIncome, TotalShares, (GTotalIncome*0.6)*
    ((TotalShares)/SUM(14000.00)) AS Dividends FROM tblDivedends GROUP BY 
    Names, MemGrpID, GTotalIncome, TotalShares

Names                 MemGrpID  GTotalIncome  TotalShares   Dividends
*Kevin Onyango Otieno  8484     30260.97      8000          10375.179339
*Paul Anam Otieno     6060      30260.97      5000          6484.478009
*Simon Kimani         8526      30260.97      1000          1296.888339

BTW如果我

SELECT SUM(TotalShares) As TotS from tblDivedends

我得到正确的结果为14000.00。

Answer 1

将总数直接添加为子查询，如果它是同一个查询，则GROUP BY生效，结果会出错。

 SELECT Names, MemGrpID, GtotalIncome, TotalShares, (GTotalIncome*0.6)*
    ((TotalShares)/SELECT SUM(TotalShares) from tblDivedends) AS Dividends FROM tblDivedends GROUP BY 
    Names, MemGrpID, GTotalIncome, TotalShares

Answer 2

另一种方法是参与：

 SELECT Names, MemGrpID, GtotalIncome, TotalShares, (GTotalIncome*0.6)*
    ((TotalShares)/SUM(TotalShares) over(partition by 1)) AS Dividends FROM tblDivedends GROUP BY 
    Names, MemGrpID, GTotalIncome, TotalShares

SQL SUM逻辑错误

2 个答案: