How to group by DateTime.Date in EntityFramework

Question

I have a device model:

public class DeviceModel
{
    public DateTime Added { get;set; }
}

And i want to select devices count, grouped by <

Answer 1

Use EntityFunctions.TruncateTime

var result = (
from device in DevicesRepository.GetAll()
group device by new { Date = EntityFunctions.TruncateTime(device.Added)} into g
select new
    {
        Date = g.Key.Date,
        Count = g.Count()
    }
).OrderBy(nda => nda.Date);