Question

我有SQL并尝试将ti转换为Linq查询。我需要按几个字段对记录进行分组，如何在Linq中执行此操作？

var statistic = DataAccess.Instance.Statistics.Where(
p =>
    p.DateStamp >= minDate &&
    p.DateStamp <= DateTime.UtcNow && p.UserId == userId &&
    p.Url.Contains(url)
    ).
    GroupBy(p=>p.PageTitle //How to group by second(Url) field? 


 SELECT PageTitle
             , Url
             , Count(*) As [Count]
          FROM Statistic
         WHERE URL like @url
         AND DateSpan BETWEEN @dateRange1 AND @dateRange2
         AND UserId = @UserId
         GROUP BY PageTitle, Url
         ORDER BY Count(*) DESC, Url;

Answer 1

您需要按匿名类型进行分组：

.GroupBy(p => new { p.PageTitle, p.Url })

Linq to SQL Group由几个领域组成

1 个答案: