CREATE TABLE table_204_311 (id NUMBER, "rank" NUMBER, "nation" CLOB, "gold" NUMBER, "silver" NUMBER, "bronze" NUMBER, "total" NUMBER)

how many countries total only received one bronze medal in the 1987 championship ?
SELECT COUNT("nation") FROM table_204_311 WHERE "bronze" = 1
SELECT COUNT("nation") FROM "table_204_311" WHERE "bronze" = 1