Efficiently Include Column not in Group By of SQL Query

Question

Given

Table A

Id   INTEGER
Name VARCHAR(50)

Table B

Id   INTEGER
FkId INTEGER  ;          


        

Answer 1

select t3.Name, t3.FkId, t3.countedFkId from (a t1 
  join (select t2.FkId, count(FkId) as countedFkId from b t2 group by t2.FkId) 
  on t1.Id = t2.FkId) t3;