CREATE TABLE table_204_652 (id DECIMAL, "title" TEXT, "year" DECIMAL, "director" TEXT, "country" TEXT, "genre" TEXT, "notes" TEXT)

which genre was used the most ?
SELECT "genre" FROM table_204_652 GROUP BY "genre" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "genre" FROM "table_204_652" GROUP BY "genre" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1