Question

I have a linq query that joins two tables (no relation in the actual db)

the relation is:
Companies 1 – n Phones

var miniCompanies =
    (from companies in db.Companies 
     join phones in db.Phones on companies.Id equals phones.CompanyId
     select new
     {
         companies.Name,
         phones.Phone,
     }).ToList().Distinct();

this returns something like:

----------------------------
company1     |    12345    |
----------------------------
company1     |    23456    |
----------------------------
company2     |    43242    |
----------------------------
company2     |    34234    |
----------------------------
company2     |    65442    |
----------------------------

i need to get only the fisrt in Phones table not everything
how to do that?
Edit:maybe i wasn’t clear about what want sorry for that.
i ment:
—————————-
company1 | 12345 |
—————————-
company2 | 43242 |
—————————-

i want the first phone for each company

Answer 1

You can use GroupBy:

var miniCompanies =
(from companies in db.Companies 
 join phones in db.Phones on companies.Id equals phones.CompanyId
 select new
 {
     companies.Name,
     phones.Phone,
 }).GroupBy(c=>c.Name).Select(c=>c.FirstOrDefault()).ToArray();