\documentclass[12pt,a4paper]{letter}
\begin{document}

\scriptsize

\begin{tabular}{||l|r||}
\multicolumn{2}{c}{\bfseries Members} \\ 
\hline \\
durc\_id		&		INTEGER UNSIGNED ZEROFILL NOT NULL AUTO\_INCREMENT PRIMARY KEY \\
surname		&		VARCHAR(100) NOT NULL DEFAULT '',\\
name &VARCHAR(100) NOT NULL DEFAULT '',\\
gender &CHAR(1), \\
date\_of\_birth &DATE,\\
course &VARCHAR(255),\\
year &ENUM('JF','SF','JS','SS','PG','Staff','Faculty','Alumni','Honorary','Other','unknown') NOT NULL ,\\
eye\_dominance &CHAR(1),\\
handedness &CHAR(1),\\
pref\_air\_rifle &VARCHAR(5),\\
pref\_free\_rifle &VARCHAR(12),\\
pref\_sporter\_rifle &VARCHAR(5),\\
pref\_jacket &TINYINT(2),\\
pref\_sling &TINYINT(2),\\
sling\_stop &DECIMAL(3,2),\\
handstop &DECIMAL(3,2),\\
air\_class &CHAR(1),\\
free\_class &CHAR(1),\\
INDEX name &(surname, name),\\
KEY &(year)\\
\hline
\end{tabular}

\end{document}
