Table: racquetball_world_games_medals
Columns: rank
nation
gold
silver
bronze
total

Question: Which nation's total is less than 19 when there's less than 1 bronze?
SQL: SELECT "nation" FROM racquetball_world_games_medals WHERE "total" < 19 AND "bronze" < 1

Question: How many totals does Chile have when the number of silvers is more than 0?
SQL: SELECT COUNT("total") FROM racquetball_world_games_medals WHERE "nation" = 'chile' AND "silver" > 0