CREATE TABLE table_204_311 (id DECIMAL, "rank" DECIMAL, "nation" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

how many nations have a total of 1 medal won ?
SELECT COUNT("nation") FROM table_204_311 WHERE "total" = 1
SELECT COUNT("nation") FROM "table_204_311" WHERE "total" = 1