CREATE TABLE "calendar" (
  "round" real,
  "circuit" text,
  "date" text,
  "pole_position" text,
  "fastest_lap" text,
  "winning_driver" text,
  "winning_team" text
);

Question: On the Circuit Zolder who was the winning team?
SQL: SELECT "winning_team" FROM "calendar" WHERE "circuit"='Circuit Zolder';

Question: In what circuit was Bruno Spengler the winning driver?
SQL: SELECT "circuit" FROM "calendar" WHERE "winning_driver"='Bruno Spengler';

Question: How many Pole Positions were there on 30 March?
SQL: SELECT COUNT("pole_position") FROM "calendar" WHERE "date"='30 March';

Question: Where was the circuit for round 4?
SQL: SELECT "circuit" FROM "calendar" WHERE "round"=4;

Question: On what date(s) was the winning team Prema Powerteam?
SQL: SELECT "date" FROM "calendar" WHERE "winning_team"='Prema Powerteam';