LaTeX.org

It was a silly mistake, I need to add the option:

\documentclass[.....,xcolor=table]{beamer}

at the preamble!

I can uncover a table columnwise in Beamer using \onslide but cannot add colors to the columns using the example below from the Beamer user guide.

Example:
---------------
\columncolors[]{1}{blue!20}{blue!10}
\begin{tabular}{l!{\vrule}c<{\onslide<2->}c<{\onslide<3->}c<{\onslide<4->}c<{\onslide}c ...