How to write the following in LINQ syntax?

Question

Just wondering how to write the following SQL in LINQ syntax

select * from COESDetails
where COESNo in
(select distinct COESNo from COESDefects)

either Fluent or Query Expression, or Both

COESDefects have a navigation property to COESDetails

public class COESDefects
{

    public int Id { get; set; }
    public int COESNo { get; set; }
    public string Comments { get; set; }       

    public virtual COESDetails COESDetails { get; set; }

}

public class COESDetails
{
    public COESDetails()
    {           
        COESDetailsCOESDefects = new List<COESDefects>();         
    }

    public int COESNo { get; set; }
    public int Postcode { get; set; }      
    public virtual ICollection<COESDefects> COESDetailsCOESDefects { get; set; }            
}

Thanks

Answer 1

I feel like it would be as simple as this:

yourDbContext.COESDetails.Where(detail => detail.COESDetailsCOESDefects.Any()).ToList();

Correct me if I'm wrong.

Answer 2

Try this:

var query =
    from x in context.COESDetails
    join y in context.COESDefects on x.COESNo equals y.COESNo into ys
    where ys.Any()
    select x;

Answer 3

Sometimes, if the query is complex, it's easier to just execute it directly e.g.

IEnumerable<COESDetails> myResults = dbConext.ExecuteQuery<CCOESDetails>("select * from COESDetails where COESNo in (select distinct COESNo from COESDefects)")