With the following, I can get a table in "two columns" - it is possible to make it three?
It is possible by splitting the whole table by human hand, but there should be some automatic solutions.
\documentclass[twocolumn]{article}
\usepackage{xtab,booktabs}
\usepackage[textheight=10cm]{geometry} %% just for this example.
\begin{document}
\topcaption{This is top caption}
\bottomcaption{This is bottom caption}
\tablecaption{this is table caption}
\tablefirsthead{\toprule First&\multicolumn{1}{c}{Name} \\ \midrule}
%
\tablehead{%
\multicolumn{2}{c}%
{{\bfseries Continued from previous column}} \\
\toprule
First&\multicolumn{1}{c}{Name}\\ \midrule}
%
\tabletail{%
\midrule \multicolumn{2}{r}{{Continued on next column}} \\ \midrule}
\tablelasttail{%
\\\midrule
\multicolumn{2}{r}{{Concluded}} \\ \bottomrule}
\begin{xtabular}{ll}
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text comes\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text\\
content & some text comes here too \\
content & some text\\
content & some text\\
content & some text\\
content & some text
\end{xtabular}%
\end{document}
\begin{xtabular}{ll}
you need three\begin{xtabular}{lll}
twocolumn
document class option? Please clarify.multicol
package to split up your page into three columns and combine this with\TrickSupertabularIntoMulticols
as for example shown here: tex.stackexchange.com/a/105736/134144