text: alter table ADM_CONFIG add DATE_UPDATED TIMESTAMP DEFAULT CURRENT_TIMESTAMP;
  update ADM_CONFIG set DATE_UPDATED = CURRENT_TIMESTAMP;
  alter table ADM_CONFIG modify DATE_UPDATED TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL;
  
  create or replace trigger TRG_ADM_CONFIG_UPD
  before update
  on ADM_CONFIG for each row
  begin
  	select CURRENT_TIMESTAMP into :new.DATE_UPDATED from dual;
  end;
  /
  
  
  -- alter table ADM_CONFIG drop column DATE_UPDATED;
  
  