\begin{Verbatim}[commandchars=\\\{\}]
\PYG{k}{CREATE}\PYG{+w}{ }\PYG{k}{TABLE}\PYG{+w}{ }\PYG{n}{distances}\PYG{+w}{ }\PYG{p}{(}
\PYG{+w}{    }\PYG{n}{graph\PYGZus{}id}\PYG{+w}{ }\PYG{n+nb}{INT}\PYG{+w}{ }\PYG{k}{NOT}\PYG{+w}{ }\PYG{k}{NULL}\PYG{p}{,}
\PYG{+w}{    }\PYG{n}{player1}\PYG{+w}{ }\PYG{n+nb}{INT}\PYG{+w}{ }\PYG{k}{NOT}\PYG{+w}{ }\PYG{k}{NULL}\PYG{p}{,}
\PYG{+w}{    }\PYG{n}{player2}\PYG{+w}{ }\PYG{n+nb}{INT}\PYG{+w}{ }\PYG{k}{NOT}\PYG{+w}{ }\PYG{k}{NULL}\PYG{p}{,}
\PYG{+w}{    }\PYG{n}{distance}\PYG{+w}{ }\PYG{n+nb}{FLOAT}\PYG{p}{,}

\PYG{+w}{    }\PYG{k}{PRIMARY}\PYG{+w}{ }\PYG{k}{KEY}\PYG{+w}{ }\PYG{p}{(}\PYG{n}{graph\PYGZus{}id}\PYG{p}{,}\PYG{+w}{ }\PYG{n}{player1}\PYG{p}{,}\PYG{+w}{ }\PYG{n}{player2}\PYG{p}{),}
\PYG{+w}{    }\PYG{k}{FOREIGN}\PYG{+w}{ }\PYG{k}{KEY}\PYG{+w}{ }\PYG{p}{(}\PYG{n}{graph\PYGZus{}id}\PYG{p}{)}\PYG{+w}{ }\PYG{k}{REFERENCES}\PYG{+w}{ }\PYG{n}{graphs}\PYG{p}{(}\PYG{n}{graph\PYGZus{}id}\PYG{p}{),}
\PYG{+w}{    }\PYG{k}{FOREIGN}\PYG{+w}{ }\PYG{k}{KEY}\PYG{+w}{ }\PYG{p}{(}\PYG{n}{player1}\PYG{p}{)}\PYG{+w}{ }\PYG{k}{REFERENCES}\PYG{+w}{ }\PYG{n}{players}\PYG{p}{(}\PYG{n}{player\PYGZus{}id}\PYG{p}{),}
\PYG{+w}{    }\PYG{k}{FOREIGN}\PYG{+w}{ }\PYG{k}{KEY}\PYG{+w}{ }\PYG{p}{(}\PYG{n}{player2}\PYG{p}{)}\PYG{+w}{ }\PYG{k}{REFERENCES}\PYG{+w}{ }\PYG{n}{players}\PYG{p}{(}\PYG{n}{player\PYGZus{}id}\PYG{p}{),}
\PYG{p}{)}
\end{Verbatim}