CREATE TABLE table_203_780 (id NUMBER, "rank" NUMBER, "diver" CLOB, "preliminary\ points" NUMBER, "preliminary\ rank" NUMBER, "final\ points" NUMBER, "final\ rank" NUMBER, "final\ total" NUMBER)

how many divers from usa ranked ?
SELECT COUNT("diver") FROM table_203_780 WHERE "diver" = 'usa'
SELECT COUNT("diver") FROM "table_203_780" WHERE "diver" = 'usa'