CREATE TABLE "scoring_format" (
  "from" real,
  "goal" text,
  "round_1" text,
  "round_2" text,
  "round_3" text,
  "round_4" text,
  "round_5" text,
  "round_6" text
);

Question: What is Round 2 when Round 4 is Double and Round 3 is Single?
SQL: SELECT "round_2" FROM "scoring_format" WHERE "round_4"='double' AND "round_3"='single';

Question: What is Round 5 when Round 4 is Triple, Round 3 is Double and Round 6+ is Triple?
SQL: SELECT "round_5" FROM "scoring_format" WHERE "round_4"='triple' AND "round_3"='double' AND "round_6"='triple';

Question: What is Round 1 from 1977 where Round 3 is Double and Round 4 is Double?
SQL: SELECT "round_1" FROM "scoring_format" WHERE "round_4"='double' AND "from"=1977 AND "round_3"='double';

Question: What is Round 2 from 1999?
SQL: SELECT "round_2" FROM "scoring_format" WHERE "from"=1999;

Question: What is Round 4 when Round 6+ is triple, Round 5 is triple and Round 3 is single?
SQL: SELECT "round_4" FROM "scoring_format" WHERE "round_6"='triple' AND "round_5"='triple' AND "round_3"='single';

Question: What is round 3 where From is earlier than 1990 and the Goal is 400?
SQL: SELECT "round_3" FROM "scoring_format" WHERE "from"<1990 AND "goal"='400';