Question

I have one table like this.

Age Group

20  G1
21  G2
20  G2
21  G1
22  G3
21  G1
20  G2
21  G2
22  G3
20  G1
22  G3

The result I want is

Age Grp Count

20  G1 2 
20  G2 2
21  G1 2
22  G2 2
22  G3 3

I can’t figure it out how to calculate by 2 group by

I have only 1 group by

   var thirdResultQuery=from row in secondResultQuery
                         group row by new {row.Grp  } into g
                         select new
                         {

                             g.Key.Grp,
                             ageCount = g.Count()
                         };

Any idea?

Answer 1

add Age in the GROUP

var thirdResultQuery    =   from row in secondResultQuery
                            group row by new {row.Grp, row.Age} into g
                            select new
                            {
                                g.Key.Age,
                                g.Key.Grp,
                                ageCount = g.Count()
                            };