Question

我有此SQL Server查询，并想将其转换为Linq：

SELECT
    [FMonth],
    [Locationn],
    (SELECT SUM(Sale) FROM [Fuels] WHERE FMonth = 1) AS Jan,
    (SELECT SUM(Sale) FROM [Fuels] WHERE FMonth = 2) AS Feb,
    (SELECT SUM(Sale) FROM[Fuels] WHERE FMonth = 3) AS March,
    (SELECT SUM(Sale) FROM [Fuels] WHERE FMonth = 4) AS April,
    (SELECT SUM(Sale) FROM [Fuels] WHERE FMonth = 5) AS May,
    (SELECT SUM(Sale) FROM [Fuels] WHERE FMonth = 6) AS Jun,
    (SELECT SUM(Sale) FROM [Fuels] WHERE FMonth = 7) AS Jul,
    (SELECT SUM(Sale) FROM [Fuels] WHERE FMonth = 8) AS  Aug 
FROM 
    [COSAuthNew].[dbo].[Fuels]

以上查询的结果是完美的图片，但我需要Total列中的所有行的总和：

OutPut

数据存储方式如下：

CompanyName | Month | Sale
H&S         |  Jan  | 1200
H&S         |  Feb  | 5000 
H&S1        |  March| 8000

但我想显示为：

CompanyName| Jan |  Feb | March | Total
H&S        |1200 | 5000  | 7000 | 13200
H&S1       |2200 | 6000  | 8000 | 16200

并在视图上显示相同的数据

Answer 1

由于您没有提供任何dbcontext或实体结构，因此linq查询如下所示，显示了1月至6月的销售额和总计。您需要按公司名称（位置）对行进行分组，然后在聚合函数SUM中使用条件值。

var result = fules.GroupBy(g => g.CompanyName)
             .Select(s=> new {
                CompanyName = s.Key,
                Jan = s.Sum(x=> x.Month == 1? x.Sale : 0),
                Feb = s.Sum(x => x.Month == 2 ? x.Sale : 0),
                Mar = s.Sum(x => x.Month == 3 ? x.Sale : 0),
                Apr = s.Sum(x => x.Month == 4 ? x.Sale : 0),
                May = s.Sum(x => x.Month == 5 ? x.Sale : 0),
                June = s.Sum(x => x.Month == 6 ? x.Sale : 0),
                Total = s.Sum(x=> x.Sale)
            });

将此SQL Server查询总计转换为Linq

1 个答案: