CREATE TABLE table_203_404 (id DECIMAL, "pennant\ number" TEXT, "name" TEXT, "builder" TEXT, "laid down" TEXT, "launched" TEXT, "completed" TEXT, "fate" TEXT)

what was the first destroyer to be completed ?
SELECT "name" FROM table_203_404 ORDER BY "completed" LIMIT 1
SELECT "name" FROM "table_203_404" ORDER BY "completed" NULLS FIRST LIMIT 1