LaTeX里边如何一个表格里创建子表格

\begin{table}
\caption{Caption for total table}
\centering

\subtable[Table 1]{
\begin{tabular}{ccc}
a & b & c
\end{tabular}
\label{firsttable}
}

\qquad

\subtable[Table 2]{        
\begin{tabular}{ccc}
A & B & C
\end{tabular}
\label{secondtable}
}

\end{table}