Table: golf_tournament_results_3
Columns: year
player
country
score
to_par
margin
earnings

Question: What is canada's margin?
SQL: SELECT SUM("margin") FROM golf_tournament_results_3 WHERE "country" = 'canada'

Question: What is russ cochran's average margin?
SQL: SELECT AVG("margin") FROM golf_tournament_results_3 WHERE "player" = 'russ cochran'

Question: Which Margin has a Country of united states, and a Score of 63-70-65-69=267?
SQL: SELECT "margin" FROM golf_tournament_results_3 WHERE "country" = 'united states' AND "score" = '63-70-65-69=267'