Exceptions in a stored procedure

Question

Hi
I am writing a stored procedure and I am running a select statement. On NO_DATA_FOUND exception, I want to raise another exception called NO_EMP_FOUND. Question is where in the stored procedure I have to define this. Remember that the select statement is within a BEGIN and END
begin
no_emp_found exception;
Begin
select a,b INTO d,c
FROM BLABLA
WHERE BLA = BLA;
EXCEPTION
WHEN NO_DATA_FOUND
RAISE NO_EMP_FOUND;
END;
<<is this where I can define the NO_EMP_FOUND, or it has to be within the internal begin and end??>>
END;
Thanks

Answer 1

Thanks damorgan,
I understand how exceptions work, but my question is specifially about how exception has to be defined when there are 2 "begins" in the procedure and the exception is caught in the internal begin. to elaborate of What I am tring to say, consider this
procedure finderror is
BEGIN
no_emp_found EXCEPTION;
begin
(SOME SELECT STATEMENT)
WHEN NO_DATA_FOUND THEN
RAISE no_emp_found
end;
EXCEPTION
WHEN no_emp_found
dbms.putline ('CAUGHT IT')
end finderror;
will the above code work, I mean conceptually (ignore the syntax). Or do I have to define the following part inside the internal (begin...end)
EXCEPTION
WHEN no_emp_found
dbms.putline ('CAUGHT IT')
Thanks