\begin{frame}
  \frametitle{ISA to Relational Model}

  \isaexample
  \begin{goal}{Method 2: many tables}
    Form a table for each entity set with all local and inherited attributes.
  \end{goal}

  \begin{center}
  {\footnotesize\ttfamily
    \colorbox{rellight}{%
      \begin{tabular}[t]{|r|r|r|}
        \multicolumn{3}{c}{Employee}        \\ \hline
        \hd{\key{id}} & \hd{name} & \hd{salary} \\ \hline 
        1 & James & 4000  \\
        \hline
      \end{tabular}%
    }~\quad~%
    \colorbox{rellight}{%
      \begin{tabular}[t]{|r|r|r|}
        \multicolumn{3}{c}{Customer}        \\ \hline
        \hd{\key{id}} & \hd{name} & \hd{credit-rating} \\ \hline 
        2 & Jones & 42 \\
        \hline
      \end{tabular}%
    }
  }
  \end{center}
  \medskip
  Typically, we also need a table for person, but\ldots
  \vspace{10cm}
\end{frame}