需要将此查询转换为linq或lambda

此查询将返回两列：userid列和当月总销售额的一列

我需要添加一个列对它们进行排序（它将与行#完全相同）

我需要将它从SQL转换为LINQ或Lambda

select pu.userID, SUM(o.OrderTotal) as OrderTotal from ProPit_User pu
inner join SeperateDB.dbo.orders o on pu.salesrepid = o.salesrepid and o.DateCompleted > '2014-05-01' and o.DateCompleted < '2014-05-23'
group by pu.userID
order by SUM(o.OrderTotal) desc

---

要使用SQL捕获排名索引，只需修改当前SQL即可：

     SELECT pu.userid, 
            SUM(o.OrderTotal) AS OrderTotal, 
            ROW_NUMBER() OVER (ORDER BY SUM(o.ordertotal) DESC) AS [Rank]
       FROM ProPit_User pu
 INNER JOIN SeperateDB.dbo.Orders o ON pu.salesrepid = o.salesrepid 
        AND o.DateCompleted > '2014-05-01' AND o.DateCompleted < '2014-05-23'
   GROUP BY pu.userid
   ORDER BY SUM(o.OrderTotal) DESC

不确定要在哪个上下文中“转换为LINQ”。如果您指的是EF或linq to Sql上下文中针对这两个表的linq查询，那么这些语句将产生与上面相同的结果：

var minDate = new DateTime(2014,5,1);
var maxDate = new DateTime(2014,5,23);

-- the linq to sql query:
-- join on salesrepid, group by userid, sum the ordertotals
var dbQuery = ProPit_Users.GroupJoin(
 Orders,
 pu => pu.salesrepid,
 o => o.salesrepid,
 (pu, orders) => new 
    {
      pu.UserId, 
      OrderTotal = orders.Where(o => o.datecompleted > minDate && o.datecompleted. < maxDate )
                         .Sum(o => o.ordertotal)
    }
 )
 .OrderByDescending(row => row.OrderTotal)
 -- materialize the db query
 .ToList();

 -- add ranking to the results of the query
 var userRankings = dbQuery.Select((row, idx) => new { Rank = ++idx, row.UserId, row.OrderTotal });

---

Row不同于Rank，您应该阅读本文了解您的需要。至于转换，不是我的强项。按顺序排列，行等于秩。第一排将排在第一位。等等。我也来看看这篇文章。你问了同样的问题（至少是第一部分）。同样的最终结果，不同的方法。您链接的问题是通过尝试获取列表的索引。这是通过SQL请求的，然后转换为LINQ/Lambda@SimonBelanger@JaazCole另外，两个人可能会有完全相同的销售，这将是太低，不必担心。我会尝试这一点，明天第一件事。我现在太困了，但是谢谢你发帖。我期待着尝试一下！：）我不能让它工作。它不允许我使用两种不同的上下文。我需要连接的每个表都在一个单独的数据库中。知道怎么解决吗？啊。我给您的linq会发出sql来连接两个表，因此无法跨服务器工作。如果您将两个基础数据集拉入两个列表，可能首先按数据范围过滤，查询本身仍将作为一个简单的linq to objects语句工作。我将Orders表放入它自己的对象中，然后将它们连接起来，现在它的工作就像一个符咒。谢谢

userID  OrderTotal Rank
340     68992.74   1
318     49575.05   2
228     42470.88   3
etc

var minDate = new DateTime(2014,5,1);
var maxDate = new DateTime(2014,5,23);

-- the linq to sql query:
-- join on salesrepid, group by userid, sum the ordertotals
var dbQuery = ProPit_Users.GroupJoin(
 Orders,
 pu => pu.salesrepid,
 o => o.salesrepid,
 (pu, orders) => new 
    {
      pu.UserId, 
      OrderTotal = orders.Where(o => o.datecompleted > minDate && o.datecompleted. < maxDate )
                         .Sum(o => o.ordertotal)
    }
 )
 .OrderByDescending(row => row.OrderTotal)
 -- materialize the db query
 .ToList();

 -- add ranking to the results of the query
 var userRankings = dbQuery.Select((row, idx) => new { Rank = ++idx, row.UserId, row.OrderTotal });

Rank UserID  OrderTotal
1    340     68992.74  
2    318     49575.05  
3    228     42470.88  
etc