DEV1> CREATE TABLE MYTABLEA (ID NUMBER, SOMEDATA VARCHAR2(80));

Table created.

DEV1> CREATE TABLE MYTABLEB (ID NUMBER, SOMEDATA VARCHAR2(80));

Table created.

DEV1>
DEV1> CREATE TRIGGER MYTABLEA_TRIG BEFORE INSERT ON MYTABLEA FOR EACH ROW
  2  BEGIN
  3     INSERT INTO MYTABLEB VALUES (:NEW.ID, :NEW.SOMEDATA);
  4  END;
  5  /

Trigger created.

DEV1>
DEV1> SELECT OBJECT_NAME, LAST_DDL_TIME FROM USER_OBJECTS WHERE OBJECT_NAME LIKE 'MYTABLE%' AND OBJECT_TYPE = 'TABLE';

OBJECT_NAME                    LAST_DDL_TIME
------------------------------ -------------------
MYTABLEA                       2019-12-09 09:24:20
MYTABLEB                       2019-12-09 09:24:20

2 rows selected.

DEV1>
DEV1> INSERT INTO MYTABLEA VALUES (0, '0');

1 row created.

DEV1> COMMIT;

Commit complete.

DEV1> EXEC DBMS_LOCK.SLEEP(5);

PL/SQL procedure successfully completed.

DEV1>
DEV1> SELECT OBJECT_NAME, LAST_DDL_TIME FROM USER_OBJECTS WHERE OBJECT_NAME LIKE 'MYTABLE%' AND OBJECT_TYPE = 'TABLE';

OBJECT_NAME                    LAST_DDL_TIME
------------------------------ -------------------
MYTABLEA                       2019-12-09 09:24:20
MYTABLEB                       2019-12-09 09:24:20

2 rows selected.