Oracle PL/SQL-Tipps

BEGIN
   << block_1 >> ------------------------------- Block 1 --------- 
    DECLARE BEGIN
       dbms_output.enable(10000);
       << block_2 >> ---------------------------- Block 2 --------- 
        DECLARE
           v_sal emp.sal%TYPE;
       BEGIN
           SELECT sal
           INTO v_sal
           FROM emp
           WHERE empno = 10000;
       EXCEPTION
           WHEN zero_divide THEN
               dbms_output.put_line('Fehler in Block_2');
               dbms_output.put_line('Fehlertext :' || sqlerrm);
       END block_2;
   EXCEPTION
       WHEN no_data_found THEN
           dbms_output.put_line('Fehler in Block_1');
           dbms_output.put_line('Fehlertext :' || sqlerrm);
   END block_1;
END;
/

ergebnis :fehler in block_1 fehlertext :ora - 01403 :keine daten gefunden