CREATE TABLE table_58242 ("Rank" TEXT, "Nation" TEXT, "Gold" FLOAT, "Silver" FLOAT, "Bronze" FLOAT, "Total" FLOAT)

what is the highest gold when the rank is 12 for the nation vietnam?
SELECT MAX("Gold") FROM table_58242 WHERE "Rank" = '12' AND "Nation" = 'vietnam'
SELECT MAX("Gold") FROM "table_58242" WHERE "Nation" = 'vietnam' AND "Rank" = '12'