\begin{frame} \frametitle{Self Joins} \begin{goal}{} In some query scenarios, we might have to consider \emph{more than one tuple of the same relation} to generate a result tuple. \end{goal} \pause\bigskip \structureAll \begin{code}{\textwidth}{Is there a student with 9 points for both, homework 1 \& 2?} \pause \small \BUseVerbatim{query} \end{code} \end{frame}