\documentclass[a4paper,DIVcalc]{scrartcl}
\usepackage{ngerman}
\usepackage[breaklinks=true]{hyperref}
\usepackage[T1]{fontenc}
\usepackage[latin1]{inputenc}
\usepackage{breakurl}

\begin{document}
\url{http://download.microsoft.com/download/5/8/8/5889d6c0-ca32-4097-807c-dc69603300ac/SQL_Server_2005_Datenblatt_de.pdf}
\end{document}