%% 
%%  Ein Beispiel der DANTE-Edition
%%  Bibliografie mit LaTeX
%%  2. Auflage
%%  Beispiel 04-10-6 auf Seite 193.
%%  Copyright (C) 2016 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% ==command biber ++FILE++== 
% Show page(s) 1
%% 
%% 
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{352.81416pt}
\usepackage[T1]{fontenc}
\usepackage[scaled=0.84]{beramono}
\usepackage[ngerman]{babel}
\usepackage[utf8]{inputenc}
\usepackage{filecontents}
%StartShownPreambleCommands
\usepackage[style=verbose]{biblatex}
\defbibcheck{online}{%
  \ifboolexpr{ not test {\iffieldundef{url}}
    and not test {\iffieldundef{urlyear}}}
      {}% Entry has both url and urldate -> it's a web source
      {\skipentry}}
\defbibcheck{hasurl}{\iffieldundef{url}{\skipentry}{}}
\defbibcheck{hasurldate}{\iffieldundef{urlyear}{\skipentry}{}}
\begin{filecontents*}{\jobname.bib}
@misc{D04,
  author = {Duthor, D.}, year = {2001}, title = {Delta}}
@online{A01,
  author = {Author, A.}, year = {2001}, title = {Alpha},
  url = {http://www.google.com/}, urldate = {2012-06-21}}
@misc{B02,
  author = {Buthor, B.}, year = {2002}, title = {Bravo},
  url = {http://www.google.com/}}
@article{C03,
  author = {Cuthor, C.}, year = {2001}, title = {Charlie},
  urldate = {2012-06-21}}
\end{filecontents*}
\addbibresource{\jobname.bib}
%StopShownPreambleCommands
\begin{document}
\nocite{*}
\printbibliography[check=online,title=Onlinequellen]
\printbibliography[check=hasurl,title=Onlinequellen mit URL]
\printbibliography[check=hasurldate],title=Onlinequellen mit Besuchsdatum]
\printbibliography
\end{document}