Select count(*) from result query

Question

I need help from you, this is my sql query:

select count(SID) 
from Test 
where Date = \'2012-12-10\' 
group by SID

this is my result:

Answer 1

select count(*) from(select count(SID) from Test where Date = '2012-12-10' group by SID)select count(*) from(select count(SID) from Test where Date = '2012-12-10' group by SID)

should works