Table: issf_1958_championships
Columns: rank
nation
gold
silver
bronze
total

Question: What rank was the country with no bronze but at least 1 silver medals?
SQL: SELECT AVG("rank") FROM issf_1958_championships WHERE "bronze" < 1 AND "silver" > 1

Question: What is the smallest number of gold medals a country with 1 bronze, and a total of 3 medals which is lower than rank 7?
SQL: SELECT MIN("gold") FROM issf_1958_championships WHERE "bronze" = 1 AND "total" = 3 AND "rank" > 7

Question: What is the smallest number of gold medals a country with 7 medals has?
SQL: SELECT MIN("gold") FROM issf_1958_championships WHERE "total" = 7