display related data even if the needed data is 0

Question

hello...

 

 how do i display related data if the data i needed result is 0. 

 

 

i have the above Sql and the result are as shown but sometime there are result that doesn't exist but i want to display 0 at the count7 column with related where condition such as ans_ss_id, ans_term and so on as above result..  how do i do that..please someone help me..tq in advance