实体框架LINQ

Question

我该如何查询哪些俱乐部的球员最多。 因此，查询将包含所有拥有最多球员的俱乐部。 例如，如果第一家具乐部有3个玩家，第二家具乐部有5个玩家，而第三家具乐部也有5个玩家，则查询中将有第二和第三家具乐部。 我需要返回俱乐部名单。

public List<Club> ClubWithMostPlayers()
{
     using (var context = new dataContext())
     {
          var query = ?????

          return query.ToList();
     }
}

这些是我使用的类

public class Player
{
    public int PlayerId { get; set; }
    public string name { get; set; }
    public string surname { get; set; }
    public int yearOfBirth { get; set; }

    public virtual List<PlayerClub> playerClub { get; set; }
}

public class Club
{
    public int ClubId { get; set; }
    public string name { get; set; }
    public string stadium { get; set; }
    public int yearOfConstruction { get; set; }

    public virtual List<PlayerClub> playerClub { get; set; }
}

public class PlayerClub
{
    public int PlayerClubId { get; set; }

    public int PlayerId { get; set; }
    public int ClubId { get; set; }

    public virtual Player player { get; set; }
    public virtual Club club { get; set; }

    public int from { get; set; }
    public int to { get; set; }
    public int appearances { get; set; }
}

我知道如何用SQL而不是LINQ做到这一点

谢谢你的帮助

Answer 1

如何将查询分为两部分。

// get number of maximum number of players in one club
var count = context.Clubs.Select(c => c.playerClub.Count()).Max();

// get clubs with specific number of players
var query = context.Clubs
    .Where(c => c.playerClub.Count() == count);