create table emp1

  2  (id number(4),

  3  ename varchar2(10),

  4  job varchar2(10),

  5  sal number(7,2));

create trigger bb

  2  after insert

  3  on emp1

  4  declare

  5  degin

  6    dbms_output.put_line( 'www' );

  7  end;

  8  /

Warning: Trigger created with compilation errors.

请问这是错哪里了？