CREATE TABLE table_203_274 (id DECIMAL, "church name" TEXT, "address" TEXT, "community" TEXT, "school" TEXT)

what is the last church located in koreatown ?
SELECT "church name" FROM table_203_274 WHERE "community" = 'koreatown' ORDER BY id DESC LIMIT 1
SELECT "church name" FROM "table_203_274" WHERE "community" = 'koreatown' ORDER BY "id" DESC NULLS LAST LIMIT 1