Table: dtm_2011_season
Columns: round
circuit
date
pole_position
fastest_lap
winning_driver
winning_team

Question: In Round 6, who is the winning team?
SQL: SELECT "winning_team" FROM dtm_2011_season WHERE "round" = '6'

Question: On what date is the winning team Abt Sportsline and pole position Mattias Ekström in the Circuit Ricardo Tormo , Valencia?
SQL: SELECT "date" FROM dtm_2011_season WHERE "winning_team" = 'Abt Sportsline' AND "pole_position" = 'Mattias Ekström' AND "circuit" = 'Circuit Ricardo Tormo , Valencia'

Question: Round 1 is in what circuit?
SQL: SELECT "circuit" FROM dtm_2011_season WHERE "round" = '1'

Question: In the circuit Showevent Olympiastadion München, where the winning driver is Bruno Spengler, what is the pole position?
SQL: SELECT "pole_position" FROM dtm_2011_season WHERE "winning_driver" = 'Bruno Spengler' AND "circuit" = 'Showevent Olympiastadion München'

Question: Where the fastest lap is Mike Rockenfeller, who is the winning driver?
SQL: SELECT "winning_driver" FROM dtm_2011_season WHERE "fastest_lap" = 'Mike Rockenfeller'

Question: How many dates are there in round 3?
SQL: SELECT COUNT("date") FROM dtm_2011_season WHERE "round" = '3'