将包含top,count,group和order的SQL转换为LINQ(2个实体)

Question

一些LINQ查询仍然困扰着我.

对于包含两列,'Page'和'Date'的表'Hits',我想找到在定义的时间片段中具有最多行的页面.

在SQL中我会使用这个:

SELECT TOP 10
      [Page]
      ,COUNT([Page]) as Number
FROM dbo.[Hits]
WHERE [Date] >= CONVERT(datetime,'14 Jan 2009')
AND [Date] < CONVERT(datetime,'15 Jan 2009')
Group BY [Page]
Order by Number DESC

在LINQ我不知道如何处理这个问题,任何人都可以帮助我吗？我尝试使用linqer转换它,但它只显示此表达式的错误.

Answer 1

这样的事情应该有效:

(from p in DataContext.Hits
where (p.Date >= minDate) && (p.Date < maxDate)
group p by p.Page into g
select new { Page = g.Key, Number = g.Count() }).OrderByDescending(x => x.Number).Take(10);

Answer 2

var top10hits = objectContext.Hits
  .Where(h => minDate <= h.Date && h.Date < maxDate)
  .GroupBy(h => h.Page)
  .Select(g => new { Page = g.Key, Number = g.Count() })
  .OrderByDescending(x => x.Number)
  .Take(10);