How many membership registrations are there in 2016?
select count(*) from membership_register_branch where register_year = 2016
Show me the name of members in them.
select t2.name from membership_register_branch as t1 join member as t2 on t1.member_id = t2.member_id where t1.register_year = 2016
Also include their hometowns.
select t2.name, t2.hometown from membership_register_branch as t1 join member as t2 on t1.member_id = t2.member_id where t1.register_year = 2016