Table: federer_2007_season
Columns: outcome
no
date
championship
surface
opponent_in_the_final
score_in_the_final

Question: Where the outcome is Winner and surface is Hard (i), what is the No.?
SQL: SELECT "no" FROM federer_2007_season WHERE "outcome" = 'Winner' AND "surface" = 'Hard (i)'

Question: On the date October 21, 2007, what is the No.?
SQL: SELECT "no" FROM federer_2007_season WHERE "date" = 'October 21, 2007'

Question: Where is the championship where 6–1, 3–6, 3–6 is the score in the final?
SQL: SELECT "championship" FROM federer_2007_season WHERE "score_in_the_final" = '6–1, 3–6, 3–6'

Question: When the  score in the final is 3–6, 6–4, 3–6, 4–6, who are all the opponents in the final?
SQL: SELECT "opponent_in_the_final" FROM federer_2007_season WHERE "score_in_the_final" = '3–6, 6–4, 3–6, 4–6'

Question: The score in the final is 2–6, 6–2, 6–0, on what surface?
SQL: SELECT "surface" FROM federer_2007_season WHERE "score_in_the_final" = '2–6, 6–2, 6–0'