What is minimum hours of the students playing in different position?
SELECT min(T2.HS) ,   T1.pPos FROM tryout AS T1 JOIN player AS T2 ON T1.pID  =  T2.pID GROUP BY T1.pPos
SELECT min(T2.HS) ,   T1.pPos FROM tryout AS T1 JOIN player AS T2 ON T1.pID  =  T2.pID GROUP BY T1.pPos
[{'min(T2.HS)': 1200, 'pPos': 'goalie'}, {'min(T2.HS)': 300, 'pPos': 'mid'}, {'min(T2.HS)': 1600, 'pPos': 'striker'}]