Minimal LaTeX booktabs example

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: