I always think standalone will display my drawings at center but below example seems clipped (the red lines).
\documentclass[border=5pt]{standalone}
\usepackage{tikz,booktabs,array}
\begin{document}
\tikzset{>=latex}
\tikzstyle{every picture}+=[remember picture,baseline]
\tikzstyle{every node}+=[inner sep=0pt,anchor=base,
minimum width=.5cm,align=center,text depth=.25ex,outer sep=1.5pt]
\tikzstyle{every path}+=[very thick]
\newcommand{\tikzmark}[2]{\tikz \node (#1) {#2};}
\begin{tabular}{|>{\bfseries}c|>{\bfseries}c|}
\toprule
\hline
\tikzmark{m00}{Number} & \tikzmark{m01}{Name} \\ \hline
\tikzmark{m10}{0} & \tikzmark{m11}{Jack} \\ \hline
\tikzmark{m20}{1} & \tikzmark{m21}{Mary} \\ \hline
\tikzmark{m30}{2} & \tikzmark{m31}{John} \\ \hline
\tikzmark{m40}{3} & \tikzmark{m41}{Alice} \\ \hline
\bottomrule
\end{tabular}
\begin{tikzpicture}[overlay,remember picture]
\coordinate (P) at ([xshift=20pt]m21.east);
\draw[red] (m11.east) -| (P);
\draw[->,red] (P) |- (m21.east);
\draw[red] (m31.east) -| (P);
\end{tikzpicture}
\end{document}

