SQL> create or replace procedure cr_tab
  2  authid current_user
  3   is
  4       pragma AUTONOMOUS_TRANSACTION;
  5    BEGIN
  6       execute immediate 'CREATE TABLE new_table (col1 NUMBER)';
  7    END;
  8  /

Procedure created.

SQL> create or replace trigger  d
  2  after insert on dept
  3  for each row
  4  begin
  5   cr_tab;
  6  end;
  7  /

Trigger created.

SQL> insert into dept values
  2  (32,'afd','ads');

1 row created.

 
SQL> desc new_table;
 Name                                                  Null?    Type
 ----------------------------------------------------- -------- ------------------------------------
 COL1                                                           NUMBER