LaTex tables with rotated column labels

Trying to get a huge correlation table into a readable pdf document using LaTeX i have to rotate the column lables since the variable names differ a lot in lenght. Dr. Andrew J. Page posted this solution on his blog:

The LaTeX package rotating is needed so include
\usepackage{rotating}
in the preample of the document.

Every single column label has to be included into
\begin{sideways}MyColumnLabel\end{sideways}
Thats a bit awkward, but thats the way it is….

An example from the blogpost mentioned above:
\begin{tabular}{rr} \hline \begin{sideways}Paper\end{sideways} &\begin{sideways}Static\end{sideways} \\ \hline HAR1994j & Journal \\ SWRT1996c & Conference \\ \hline \end{tabular}