SOURCE: http://www.latex-community.org/forum/viewtopic.php?f=45&p=39549
\documentclass{article}
\usepackage{makecell}
\begin{document}
\begin{tabular}{cc}
Column1a & Column2a \\
Column1b & \Gape[1cm][1cm]{Column2b} \\
Column1c & Column2c \\
Column1d & Column2d \\
\end{tabular}
\end{document}
source: http://www.maths.leeds.ac.uk/latex/TableHelp1.pdf
1. create a table in landscape mode, rotating package is included with
\usepackage{rotating} command
2. then the table is produced using \begin{sidewaystable},
and \end{sidewaystable}:
----------- Code example -----------------------
\begin{sidewaystable}[h]
\caption{Performance After Post Filtering} % title name of the table
\centering % centering table
\begin{tabular}{l c c rrrrrrr} % creating 10 columns
\hline\hline % inserting double-line
Audio &Audibility & Decision &\multicolumn{7}{c}{Sum of Extracted Bits}
\\ [0.5ex]
\hline % inserts single-line
% Entering 1st row
& &soft &1 & $-1$ & 1 & 1 & $-1$ & $-1$ & 1 \\[-1ex]
\raisebox{1.5ex}{Police} & \raisebox{1.5ex}{5}&hard
& 2 & $-4$ & 4 & 4 & $-2$ & $-4$ & 4 \\[1ex]
% Entering 2nd row
& &soft & 1 & $-1$ & 1 & 1 & $-1$ & $-1$ & 1 \\[-1ex]
\raisebox{1.5ex}{Beethoven} & \raisebox{1.5ex}{5}& hard
&8 & $-8$ & 2 & 8 & $-8$ & $-8$ & 6 \\[1ex]
% Entering 3rd row
& &soft & 1 & $-1$ & 1 & 1 & $-1$ & $-1$ & 1 \\[-1ex]
\raisebox{1.5ex}{Metallica} & \raisebox{1.5ex}{5}& hard
&4 & $-8$ & 8 & 4 & $-8$ & $-8$ & 8 \\[1ex]
% [1ex] adds vertical space
\hline % inserts single-line
\end{tabular}
\label{tab:LPer}
\end{sidewaystable}
-------------------------end----------------