Show the name of each party and the corresponding number of delegates from that party.
SELECT T2.Party ,  COUNT(*) FROM election AS T1 JOIN party AS T2 ON T1.Party  =  T2.Party_ID GROUP BY T1.Party
name of each party refers to T2.Party; number of delegates from that party refers to COUNT(*); corresponding refers to JOIN operation on T1.Party and T2.Party_ID;