oracle的marge into 語法

MERGE INTO BO_xx B1
USING (SELECT '1' ID, '12' CODE
         FROM DUAL) B2
ON (B1.ID = B2.ID AND B1.CODE = B2.CODE)
WHEN MATCHED THEN
  UPDATE
     SET B1.b1= TO_DATE('2022-12-13', 'yyyy-mm-dd hh24:mi:ss')
   WHERE B1.XXX='XXX'
WHEN NOT MATCHED THEN
  INSERT INTO TABLE
    (DATE)
  VALUES
    ( TO_DATE('2012-12-12', 'yyyy-mm-dd hh24:mi:ss'))