CREATE TABLE table_65288 ("Rank" TEXT, "Nation" TEXT, "Gold" FLOAT, "Silver" FLOAT, "Bronze" FLOAT, "Total" FLOAT)

How much Gold has a Nation of mongolia, and a Total larger than 18?
SELECT SUM("Gold") FROM table_65288 WHERE "Nation" = 'mongolia' AND "Total" > '18'
SELECT SUM("Gold") FROM "table_65288" WHERE "Nation" = 'mongolia' AND "Total" > '18'