\begin{frame} \frametitle{All, Any, Some} \begin{goal}{} SQL allows to compare \emph{single value} with all values computed by a \emph{single-column} subquery. Such comparisons may be \begin{itemize} \item \emph{universally} (\sql{all}), or \item \emph{existentially} (\sql{any}, or equivalently \sql{some}) \end{itemize} quantified. \end{goal} \pause \smallskip \begin{code}{\textwidth}{Who got the best result for homework 1?} {\small \BUseVerbatim{query} } \end{code} The subquery must yield a \alert{single result column}. \end{frame}