Question: Show all party names and the number of members in each party.
Schema: create table party (party_name varchar, party_id varchar, PRIMARY KEY (party_name)); create table member (party_id varchar, PRIMARY KEY (party_id))
SQL: select t2.party_name, count(*) from member as t1 join party as t2 on t1.party_id = t2.party_id group by t1.party_id