Table: dtm_2010_season
Columns: round
circuit
date
pole_position
fastest_lap
winning_driver
winning_team

Question: What is the circuit of round 5?
SQL: SELECT "circuit" FROM dtm_2010_season WHERE "round" = 5

Question: What date did Mike Rockenfeller have the fastest lap?
SQL: SELECT "date" FROM dtm_2010_season WHERE "fastest_lap" = 'Mike Rockenfeller'