set serveroutput on

 1  declare
 3  begin
 4   insert into tmp_3(user_no,tc) values(98765432103211,'IJ');
 5   exception when others then
 6   DBMS_OUTPUT.put_line   (       'ERR:insert_exception_log: '
 7                                                                ||   TO_CHAR   (SQLCODE)
 8                                                                ||   '   '
 9                                                                ||   SQLERRM
10                                                              );
11 end;