选择不同的值并在不同之前计数

Question

table1:

pid   fid     year      
1     a       1990
1     a       2002
1     a       2005
3     b       2000
3     b       2002
3     c       1999

i want the result to be :

  pid  fid  count
    1    a     3
    3    b     2
    3    c     1

itried

select distinct(fid), pid , count(pid)
from table1

any help please thanks.

Answer 1

select pid, fid, count(*)
from table1
group by pid, fid