\begin{longtable}[]{@{}
  >{\raggedright\arraybackslash}p{(\columnwidth - 2\tabcolsep) * \real{0.50}}
  >{\raggedright\arraybackslash}p{(\columnwidth - 2\tabcolsep) * \real{0.50}}@{}}
\caption{List of Students}\tabularnewline
\toprule
Student ID & Name \\
\midrule
\endfirsthead
\toprule
Student ID & Name \\
\midrule
\endhead
\multicolumn{2}{l}{Computer Science} \\
3741255 & Jones, Martha \\
4077830 & Pierce, Benjamin \\
5151701 & Kirk, James \\
\multicolumn{2}{l}{Russian Literature} \\
3971244 & Nim, Victor \\
\multicolumn{2}{l}{Astrophysics} \\
4100332 & Petrov, Alexandra \\
4100332 & Toyota, Hiroko \\
\bottomrule
\end{longtable}
