CREATE TABLE table_name_70 (silver NUMBER, total VARCHAR2, gold VARCHAR2, rank VARCHAR2)

How many Silvers that has a Gold smaller than 1, and a Rank of 9, and a Total smaller than 1?
SELECT SUM(silver) FROM table_name_70 WHERE gold < 1 AND rank = "9" AND total < 1
SELECT SUM("silver") FROM "table_name_70" WHERE "9" = "rank" AND "gold" < 1 AND "total" < 1