Table: pga_tour_1994
Columns: date
tournament
location
winner
score
1st_prize

Question: What is the average first prize of the tournament with a score of 279 (–9)?
SQL: SELECT AVG("1st_prize") FROM pga_tour_1994 WHERE "score" = '279 (–9)'

Question: What is the lowest first prize of the Mercedes Championships tournament in California?
SQL: SELECT MIN("1st_prize") FROM pga_tour_1994 WHERE "location" = 'california' AND "tournament" = 'mercedes championships'