DECLARE
  v_ename employee.employeename%TYPE;
BEGIN
  SELECT employeename  INTO v_ename FROM employee WHERE sal=&&v_sal;
  dbms_output.put_line('員工名：'||v_ename);
EXCEPTION
  WHEN NO_DATA_FOUND THEN
    dbms_output.put_line('不存在工資為'||&v_sal||'的員工');
  when others then
    dbms_output.put_line('錯誤號'||SQLCODE);
    dbms_output.put_line('錯誤提示：'||SQLERRM);
END;