Question

I have the following table, how would I go about returning the number of occurrences of each id that has status=pass

id  status
111 pass
111 fail
333 pass
222 pass
333 pass
222 fail

so that the result set would look like this

id  num_occurrences
111 1
222 1
333 2

Answer 1

Try this::

 select id, count(id) as num_occurrences from table where status="pass" group by id