Table: big_ten_football_2007
Columns: date
bowl_game
big_ten_team
opp_team
score

Question: What bowl game was played on Dec. 26, 2007?
SQL: SELECT "bowl_game" FROM big_ten_football_2007 WHERE "date" = 'dec. 26, 2007'

Question: Who was the opposing team in the game with a score of 21-17?
SQL: SELECT "opp_team" FROM big_ten_football_2007 WHERE "score" = '21-17'

Question: Who was Purdue's opponent?
SQL: SELECT "opp_team" FROM big_ten_football_2007 WHERE "big_ten_team" = 'purdue'

Question: What was the score of the Insight Bowl?
SQL: SELECT "score" FROM big_ten_football_2007 WHERE "bowl_game" = 'insight bowl'

Question: What was the score of the BCS National Championship game?
SQL: SELECT "score" FROM big_ten_football_2007 WHERE "bowl_game" = 'bcs national championship'