CREATE TABLE table_204_671 (id NUMBER, "airing\ date" CLOB, "english title\ ( chinese title ) " CLOB, "number of episodes" NUMBER, "main cast" CLOB, "theme song  ( t ) \ sub-theme song  ( st ) " CLOB, "genre" CLOB, "notes" CLOB, "official website" CLOB)

how many movies have at least 20 episodes ?
SELECT COUNT(*) FROM table_204_671 WHERE "number of episodes" >= 20
SELECT COUNT(*) FROM "table_204_671" WHERE "number of episodes" >= 20