How can I have two tables side by side?

Question

Suppose I have two tables that don't have many columns (3, for example). How can I position them side by side?

Answer 1

Just put two tabular environments side by side. Add spacing as desired.

\begin{tabular}{ccc}
\hline
a&b&c\\
\hline
\end{tabular}
\quad
\begin{tabular}{ccc}
\hline
d&e&f\\
\hline
\end{tabular}

If you want to use subfig because you want them to have separate captions, then that is simple as well.

\subfloat[caption]{\begin{tabular}{...}...\end{tabular}}
\quad
\subfloat[caption]{\begin{tabular}{...}...\end{tabular}}

If you want two tables that are independent, and thus don't want to use \subfloat, you can use \parbox.

\begin{table}
\parbox{.45\linewidth}{
\centering
\begin{tabular}{ccc}
\hline
a&b&c\\
\hline
\end{tabular}
\caption{Foo}
}
\hfill
\parbox{.45\linewidth}{
\centering
\begin{tabular}{ccc}
\hline
d&e&f\\
\hline
\end{tabular}
\caption{Bar}
}
\end{table}

This is basically the same as before just that I've centered each tabular in a \parbox with an included caption and wrapped the whole thing in a table.

Answer 2

If you want two tabulars next to each other in a (floating) table environment, then you can use minipages

\begin{table}[!htb]
    \caption{Global caption}
    \begin{minipage}{.5\linewidth}
      \caption{}
      \centering
        \begin{tabular}{ll}
            1 & 2
        \end{tabular}
    \end{minipage}%
    \begin{minipage}{.5\linewidth}
      \centering
        \caption{}
        \begin{tabular}{ll}
            3 & 4
        \end{tabular}
    \end{minipage} 
\end{table}

Loading the caption package will allow easy customization, and will remove the : when the caption is empty.

If you'd like 'sub'tables, then you can use the subcaption package which introduces the subtable environment (and a lot more); the subtable environment takes the same mandatory and optional arguments as the minipage

\documentclass{article}
\usepackage{subcaption}
\begin{document}

\begin{table}[!htb]
    \caption{Global caption}
    \begin{subtable}{.5\linewidth}
      \centering
        \caption{}
        \begin{tabular}{ll}
            1 & 2
        \end{tabular}
    \end{subtable}%
    \begin{subtable}{.5\linewidth}
      \centering
        \caption{}
        \begin{tabular}{ll}
            3 & 4
        \end{tabular}
    \end{subtable} 
\end{table}

\end{document}

Note that in both cases I've used a % at the end of the environment to stop overfull hboxes from the additional space added by the minipage.

Answer 3

I don't know that this is the best way, but you could make a 2-column table with a single row. In each cell of the table, wrap one of your intended tables in a minipage environment. Thus:

\documentclass{article}

\begin{document}

\begin{tabular}{cc}
    \begin{minipage}{.5\linewidth}
        \begin{tabular}{ll}
            1 & 2
        \end{tabular}
    \end{minipage} &

    \begin{minipage}{.5\linewidth}
        \begin{tabular}{ll}
            3 & 4
        \end{tabular}
    \end{minipage} 
\end{tabular}

\end{document}

Answer 4

Ceteris paribus, you might consider the subfig package. It is suitable for subtables and subfigures and combinations of these. For myself, I've managed much mileage from it.

Answer 5

As the solution for tables (not subtables) side by side with the floatrow package is not mentioned here, I'll add it under the form of an answer to this duplicate question.

You can do that easily with the floatrow package. I took the opportunity to propose another layout, without vertical rules, with booktabs. For your original layout I added some vertical padding to the rows, with the makecell package.

\documentclass[a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{fourier, erewhon}
\usepackage{geometry}
\usepackage{array, caption, floatrow, tabularx, makecell, booktabs}%
\captionsetup{labelfont = sc}
\setcellgapes{3pt}

\begin{document}

\begin{table}[!htb]
  \floatsetup{floatrowsep=qquad, captionskip=4pt}
  \begin{floatrow}[2]
    \makegapedcells
    \ttabbox%
    {\begin{tabularx}{0.45\textwidth}{|c| *{2}{>{\centering\arraybackslash}X|}}
      \hline
      & Sensibilità [$\%$] & Specificità [$\%$] \\
      \hline
      $ϵ'$ & 53.492 & 77.906 \\ \hline
      $ϵ''$ & 46.753 & 61.587\\
      \hline
      \end{tabularx}}
    {\caption[Valori medi]{valori medi}
      \label{val1}}
    \hfill%
    \ttabbox%
    {\begin{tabularx}{0.45\textwidth}{|c| *{2}{>{\centering\arraybackslash}X|}}
      \hline
      & Sensibilità [$\%$] & Specificità [$\%$]\\
      \hline
      $ϵ'$ & 60\hphantom{.000} & 80.487 \\ \hline
      $ϵ''$ & 54.545 & 67.777\\
      \hline
      \end{tabularx}}
    {\caption[Valori medi]{valori medi}
      \label{val2}}
  \end{floatrow}
  \vspace*{1cm}
  \begin{floatrow}[2]
    \ttabbox%
    {\begin{tabularx}{0.45\textwidth}{c *{2}{>{\centering\arraybackslash}X}}
      \toprule
      & Sensibilità [$\%$] & Specificità [$\%$] \\
      \cmidrule(lr){2-2}\cmidrule(lr){3-3}
      $ϵ'$ & 53.492 & 77.906 \\
      \addlinespace
      $ϵ''$ & 46.753 & 61.587\\
      \bottomrule
      \end{tabularx}}
    {\caption[Valori medi]{valori medi}
      \label{val1a}}
    \hfill%
    \ttabbox%
    {\begin{tabularx}{0.45\textwidth}{c*{2}{>{\centering\arraybackslash}X}}
      \toprule
      & Sensibilità [$\%$] & Specificità [$\%$]\\
      \cmidrule(lr){2-2}\cmidrule(lr){3-3}
      $ϵ'$ & 60\hphantom{.000} & 80.487 \\
      \addlinespace
      $ϵ''$ & 54.545 & 67.777\\
      \bottomrule
      \end{tabularx}}
    {\caption[Valori medi]{valori medi}
      \label{val2a}}
  \end{floatrow}
\end{table}%

\end{document} 

Answer 6

2 tables side by side, with (or without) caption, without new packages: Just imbricate 2 tables! It is perfectly fine to have a table as a "regular" entry of another table

The top level table has 2 columns and 2 rows. The top row is the caption, the bottom row contains the "real" tables that you want.

See how \\ and & are used after \end{tabular}

\begin{tabular}{ cc }   % top level tables, with 2 columns
caption 1 & caption 2 \\  
% leftmost table of the top level table
\begin{tabular}{ |c|c|c| } 
\hline
a & b & c \\
a & b & c \\
\hline
\end{tabular} &  % starting rightmost sub table
% table 2
\begin{tabular}{ |c|c|c| } 
\hline
d & e & f \\
d & e & f \\
\hline
\end{tabular} \\
\end{tabular}

Answer 7

I will add another answer to this question because I think this solution is more simple, for simple usages like putting two table side by side.

\documentclass[12pt]{article}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{hyperref}
\usepackage[latin1]{inputenc}

\title{Table side by side}
\author{Vincenzo Palazzo}
\date{02/04/2023}

\begin{document}

\begin{table}[!htb]
    \caption{Input and output transaction struct of Bitcoin Code.}
    \begin{center}
        \subtable{
            \begin{tabular}{|c|c|}
                \hline
                \multicolumn{2}{|c|}{\textbf{TransactionInput}} \\
                \hline \hline
                \multicolumn{1}{|c|}{Type} & \multicolumn{1}{c|}{Name} \\
                \hline
                Outpoint & outpoint   \\
                \hline
                CScript & scriptSig \\
                \hline
                $uint32\_t$ & nSequence \\
                \hline
            \end{tabular}
            \centering
        } 
        \subtable{
          \centering
            \begin{tabular}{|c|c|}
                \hline
                \multicolumn{2}{|c|}{\textbf{Outpoint}} \\
                \hline \hline
                \multicolumn{1}{|c|}{Type} & \multicolumn{1}{c|}{Name} \\
                \hline
                $uint256$ & hash   \\
                \hline
                $uint32\_t$ & index \\
                \hline
            \end{tabular}   
        } 
    \end{center}
    \label{tab:tx_in_and_out}
\end{table}

\end{document}