Sql to see the definition of an created trigger

Question

Hy, what sql to use to see the entire definition of an already created trigger of a table?
Thanks

Answer 1

DBMS_METADATA package: http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_metada.htm#ARPLS026
SQL> create or replace trigger emp_trg
  2  before insert
  3  on emp
  4  for each row
  5  begin
  6    null;
  7  end;
  8  /
Trigger created.
SQL> select dbms_metadata.get_ddl('TRIGGER', 'EMP_TRG') from dual;
DBMS_METADATA.GET_DDL('TRIGGER','EMP_TRG')
  CREATE OR REPLACE TRIGGER "HOEK"."EMP_TRG"
before insert
on emp
for each row
begin
  null;
end;
ALTER TRIGGER "HOEK"."EMP_TRG" ENABLE
1 row selected.