\begin{frame}
  \frametitle{Motivation for Database Management Systems}

  \begin{goal}{Why not just store data in files?}
  \begin{itemize}
    \item \emph{no query language}
    \item \emph{weak logical structure} (limited to directories)
    \item \emph{no efficient access}
      \begin{itemize}
        \item searching through a large file can take hours
      \end{itemize}
    \item no or \emph{limited protection} from data loss
    \item \emph{no access control} for parallel manipulation of data
  \end{itemize}
  \end{goal}
  \bigskip
  
  So we need database management systems\ldots
\end{frame}