CREATE TABLE table_203_239 (id DECIMAL, "year" DECIMAL, "title" TEXT, "chinese title" TEXT, "role" TEXT, "notes" TEXT)

what film was done next after ` once a cop ' ?
SELECT "title" FROM table_203_239 WHERE id = (SELECT id FROM table_203_239 WHERE "title" = 'once a cop') + 1
SELECT "title" FROM "table_203_239" WHERE "id" = (SELECT "id" FROM "table_203_239" WHERE "title" = 'once a cop') + 1