CREATE TABLE table_204_276 (id DECIMAL, "record" TEXT, "date" TEXT, "result" TEXT, "opponent" TEXT, "location" TEXT, "method" TEXT, "round" DECIMAL)

what is the name of the last opponent on this chart ?
SELECT "opponent" FROM table_204_276 ORDER BY id DESC LIMIT 1
SELECT "opponent" FROM "table_204_276" ORDER BY "id" DESC NULLS LAST LIMIT 1