This is a minimal example using the LaTeX booktabs package which you can use & modify to create your own table.
\documentclass{scrartcl} \usepackage{booktabs} \usepackage[utf8x]{inputenc} \begin{document} \begin{table}[h!] \begin{center} \caption{Minimal booktabs example.} \label{tab:table1} \begin{tabular}{l|c|r} \toprule % <-- Toprule here \textbf{Column 1} & \textbf{Column 2} & \textbf{Column 3}\\ $\alpha$ & $\beta$ & $\gamma$ \\ \midrule % <-- Midrule here A & 10.23 & a\\ B & 45.678 & b\\ C & 99.987 & c\\ \bottomrule % <-- Bottomrule here \end{tabular} \end{center} \end{table} \end{document}
Render it using
pdflatex booktabs.tex
The table looks like this: