Table schema:
CREATE TABLE Student (StuID VARCHAR, age INTEGER); CREATE TABLE Sportsinfo (StuID VARCHAR)

Question: Show total hours per week and number of games played for students under 20.
SQL: SELECT SUM(hoursperweek), SUM(gamesplayed) FROM Sportsinfo AS T1 JOIN Student AS T2 ON T1.StuID = T2.StuID WHERE T2.age < 20