Convert SQL query to Entity Framework which used AggregateFunctions and Where clause - sql

Question

How can I convert this query to Entity Framework?
SQL query:
SELECT Fullname, SUM(CoinCount+DiamondCount) AS GeneralPoint
FROM Students, Groups
WHERE Students.GroupId = Groups.Id AND Groups.Name = 'FSDA_1813_az'
GROUP BY Fullname
ORDER BY GeneralPoint
Entity:
public class Student
{
public int Id { get; set; }
public int GroupId { get; set; }
public string Fullname { get; set; }
public Nullable<int> DiamondCount { get; set; }
public Nullable<int> CoinCount { get; set; }
public string Phone { get; set; }
public string Address { get; set; }
public string Education { get; set; }
public string Email { get; set; }
public System.DateTime Birthdate { get; set; }
public string Username { get; set; }
public string Password { get; set; }
public Nullable<System.DateTime> LastVisited { get; set; }
public string Facebook { get; set; }
public string Linkedin { get; set; }
public string SocialMedia { get; set; }
public byte[] Photo { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<Comment> Comments { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<Exam> Exams { get; set; }
public virtual Group Group { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<Point> Points { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<StudentHomework> StudentHomeworks { get; set; }
}
UserRepository:
public ICollection<Student> GetUsersForGroup(string group)
{
using (var db = new EFContext())
{
var temp = db.Students.Where(x => x.Group.Name == group).ToList();
// I have to sort students in group by their DiamondCount+CoinCount as new GeneralCount
temp = temp.OrderBy(x => );
}
}
I have to sort students for their general point (DiamondCount+CoinCount).
But I can't send LINQ query by using Entity Framework. How can I do this?

Answer 1

Not tested but it should work:
var result = db.Students.Where(x => x.Group.Name == group)
.GroupBy(g => g.Fullname)
.Select(i => new
{
FullName = i.Key,
GeneralPoint = i.Sum(s => s.DiamondCount + s.CoinCount)
})
.OrderBy(o => o.GeneralPoint)
.ToList();