Table: segunda_division_1970_71
Columns: position
club
played
points
wins
draws
losses
goals_for
goals_against
goal_difference

Question: What is the average Draws, when Goal Difference is greater than -3, when Goals Against is 30, and when Points is greater than 45?
SQL: SELECT AVG("draws") FROM segunda_division_1970_71 WHERE "goal_difference" > -3 AND "goals_against" = 30 AND "points" > 45

Question: What is the average Played, when Club is "Burgos CF", and when Draws is less than 7?
SQL: SELECT AVG("played") FROM segunda_division_1970_71 WHERE "club" = 'burgos cf' AND "draws" < 7

Question: What is the highest Goals Against, when Club is "Pontevedra CF", and when Played is less than 38?
SQL: SELECT MAX("goals_against") FROM segunda_division_1970_71 WHERE "club" = 'pontevedra cf' AND "played" < 38