CREATE TABLE table_69737 ("Rank" FLOAT, "Nation" CLOB, "Gold" FLOAT, "Silver" FLOAT, "Bronze" FLOAT, "Total" FLOAT)

Name the sum of rank for silver less than 0
SELECT SUM("Rank") FROM table_69737 WHERE "Silver" < '0'
SELECT SUM("Rank") FROM "table_69737" WHERE "Silver" < '0'