multiple select in one sql statement

Question

I have a table of survey answers, something like:

date     |  q1  | q2 |
12/12/10 | yes | no | 
12/13/10 | no  | no | 

and I would like to

Answer 1

You could use:

select q1, q2, count(*)
from survey
group by q1, q2

Or, if you want to get those exact same results:

select count(case when q1 = 'Yes' then q1 else null end) as q1_yes,
       count(case when q1 = 'No' then q1 else null end) as q1_no,
       count(case when q2 = 'Yes' then q2 else null end) as q2_yes
from survey

Your implementation of "case" may vary, the important thing is you can set everything you don't want to null and it won't be counted by count() :)