Table: grand_prix_motorcycle_2009
Columns: round
date
grand_prix
circuit
125cc_winner
250cc_winner
motogp_winner
report

Question: Which Date has a MotoGP winner of casey stoner, and a 250cc winner of hiroshi aoyama?
SQL: SELECT "date" FROM grand_prix_motorcycle_2009 WHERE "motogp_winner" = 'casey stoner' AND "250cc_winner" = 'hiroshi aoyama'

Question: Which 250cc winner has a 125cc winner of bradley smith, and a MotoGP winner of casey stoner?
SQL: SELECT "250cc_winner" FROM grand_prix_motorcycle_2009 WHERE "125cc_winner" = 'bradley smith' AND "motogp_winner" = 'casey stoner'

Question: Which Round is the lowest one that has a Circuit of donington?
SQL: SELECT MIN("round") FROM grand_prix_motorcycle_2009 WHERE "circuit" = 'donington'

Question: Which MotoGP winner has a 250cc winner of marco simoncelli, and a Round of 15?
SQL: SELECT "motogp_winner" FROM grand_prix_motorcycle_2009 WHERE "250cc_winner" = 'marco simoncelli' AND "round" = 15

Question: Which 250cc winner has a 125cc winner of bradley smith, and a Circuit of mugello?
SQL: SELECT "250cc_winner" FROM grand_prix_motorcycle_2009 WHERE "125cc_winner" = 'bradley smith' AND "circuit" = 'mugello'

Question: Which 250cc winner has a Round larger than 6, and a Date of 26 july?
SQL: SELECT "250cc_winner" FROM grand_prix_motorcycle_2009 WHERE "round" > 6 AND "date" = '26 july'