Table: gremelmayr_match
Columns: date
tournament
surface
opponent
score

Question: What is the tournament with a w/o score on November 5, 2007?
SQL: SELECT "tournament" FROM gremelmayr_match WHERE "score" = 'w/o' AND "date" = 'november 5, 2007'

Question: What is the surface of eckental tournament with a w/o score?
SQL: SELECT "surface" FROM gremelmayr_match WHERE "tournament" = 'eckental' AND "score" = 'w/o'

Question: What is the tournament with a hard surface and Ruben de Kleijn as the opponent?
SQL: SELECT "tournament" FROM gremelmayr_match WHERE "surface" = 'hard' AND "opponent" = 'ruben de kleijn'

Question: What is the score of the tournament on November 5, 2007 with a carpet surface?
SQL: SELECT "score" FROM gremelmayr_match WHERE "surface" = 'carpet' AND "date" = 'november 5, 2007'

Question: What is the surface of the tournament with Sascha Kloer as the opponent?
SQL: SELECT "surface" FROM gremelmayr_match WHERE "opponent" = 'sascha kloer'