如何将 sql 查询转换为 LINQ 查询？答案

【问题标题】：How to convert sql query to LINQ query?如何将 sql 查询转换为 LINQ 查询？
【发布时间】：2014-11-26 12:49:18
【问题描述】：

我是 LINQ 新手，我需要将此 SQL 查询转换为 LINQ 查询：

SELECT 
    SUM(t.NH) AS SumofNH,
    SUM(t.[T1.5]) AS soumofT1,
    SUM(t.DT) AS SumOfDT,
    SUM(pu.Amount) AS Amount, 
    s.ScopeID AS scopeId 
from 
    [dbo].[PO] as p
join 
    [dbo].[POUnit] as pu on p.POID = p.POID
join 
    [dbo].[Scope] as s on pu.ScopeCodeID = s.ScopeID
join 
    [dbo].[Timesheet] as t on s.ScopeID=t.ScopeID
join 
    [dbo].[Projects] as pr on s.ProjectID = pr.ProjectID
where 
    s.[ProjectID] = 1 
group by 
    s.ScopeID

有人可以帮帮我吗？提前致谢。

【问题讨论】：

标签： sql .net database linq entity-framework

【解决方案1】：

您的 SQL to LINQ 如下所示：- 试试这个

from po1 in PO
   join pu in POUnit on po1.POID equals pou.POID
   join s in Scope on pou.ScopeCodeID equals s.ScopeID
   join t in Timesheet on s.ScopeID equals t.ScopeID
   join pr in Projects on s.ProjectID equals pr.ProjectID
   where s.ProjectID = 1
   group by s.ScopeID
   Select new 
     {
        SumofNH = SUM(t.NH),
        soumofT1 = SUM(t.[T1.5]),
        SumOfDT = SUM(t.DT),
        Amount = SUM(pu.Amount), 
        scopeId = s.ScopeID
     }

【讨论】：