Table: family_feud_scores_2
Columns: from
goal
round_1
round_2
round_3
round_4
round_5
round_6

Question: What is Round 2 when Round 4 is Double and Round 3 is Single?
SQL: SELECT "round_2" FROM family_feud_scores_2 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 family_feud_scores_2 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 family_feud_scores_2 WHERE "round_4" = 'double' AND "from" = 1977 AND "round_3" = 'double'

Question: What is Round 2 from 1999?
SQL: SELECT "round_2" FROM family_feud_scores_2 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 family_feud_scores_2 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 family_feud_scores_2 WHERE "from" < 1990 AND "goal" = '400'