Table: golf_results_20
Columns: date
tournament
winning_score
margin_of_victory
runner_up

Question: Who was the runner-up on 5 aug 1990?
SQL: SELECT "runner_up" FROM golf_results_20 WHERE "date" = '5 aug 1990'

Question: Which Tournament has a Winning score of −14 (65-69-72-68=274)?
SQL: SELECT "tournament" FROM golf_results_20 WHERE "winning_score" = '−14 (65-69-72-68=274)'

Question: Which Runner-up has a Winning score of −20 (70-69-64-65=268)?
SQL: SELECT "runner_up" FROM golf_results_20 WHERE "winning_score" = '−20 (70-69-64-65=268)'

Question: Which Date has a Winning score of −15 (71-69-68-65=273)?
SQL: SELECT "date" FROM golf_results_20 WHERE "winning_score" = '−15 (71-69-68-65=273)'

Question: In which tournament was vijay singh a runner-up?
SQL: SELECT "tournament" FROM golf_results_20 WHERE "runner_up" = 'vijay singh'

Question: In which tournament was vijay singh a runner-up?
SQL: SELECT "tournament" FROM golf_results_20 WHERE "runner_up" = 'vijay singh'