Table: saloon_car_champ
Columns: round
circuit
date
class_a_winner
class_b_winner
class_c_winner
class_d_winner

Question: Who was the Class A winner when the Class C winner was David Haynes?
SQL: SELECT "class_a_winner" FROM saloon_car_champ WHERE "class_c_winner" = 'David Haynes'

Question: Who was the Class C winner in round 8?
SQL: SELECT "class_c_winner" FROM saloon_car_champ WHERE "round" = '8'

Question: Who was the Class D winner in round 6?
SQL: SELECT "class_d_winner" FROM saloon_car_champ WHERE "round" = '6'

Question: What was the circuit in round 2?
SQL: SELECT "circuit" FROM saloon_car_champ WHERE "round" = '2'