Question

I am having a problem I haven’t been able to solve.
I have a table with the following columns:
Personid, type.

There can be several rows for each personid
My desired outcome would be an aggregation of how many rows of type 5,12,71 each person has.

So the table will look like this:

  Personid  type 5  type 12  type 71

   11          0       2        7
   15          1       6        0

Answer 1

select
  personid,
  count(case when type = 5 then 1 end) type5cnt,
  count(case when type = 12 then 12 end) type12cnt,
  count(case when type = 71 then 71 end) type71cnt
from table_name
group by personid