CREATE TABLE table_204_508 (id DECIMAL, "no." DECIMAL, "race title" TEXT, "track" TEXT, "date" TEXT, "tv" TEXT)

what will be the last track used during this season ?
SELECT "track" FROM table_204_508 ORDER BY "date" DESC LIMIT 1
SELECT "track" FROM "table_204_508" ORDER BY "date" DESC NULLS LAST LIMIT 1