CREATE TABLE table_204_813 (id DECIMAL, "year" DECIMAL, "competition" TEXT, "venue" TEXT, "position" TEXT, "event" TEXT, "notes" TEXT)

at which competition did the competitor throw the javelin the farthest ?
SELECT "competition" FROM table_204_813 ORDER BY "notes" DESC LIMIT 1
SELECT "competition" FROM "table_204_813" ORDER BY "notes" DESC NULLS LAST LIMIT 1