example_table.tex

\begin{table}
	\caption{Put your laTeX caption here}
	\label{Put your laTex label here}
	\centering
	\begin{subtable}{0.49\textwidth}
		\centering
		\begin{tabular}{S[table-format=2.3] @{${}\pm{}$} S[table-format=2.3] S[table-format=2.3] S[table-format=1.9] }
			\toprule
			\multicolumn{2}{c}{Messwert 1} & {Messwert 2} & {Messwert 3}\\
			\multicolumn{2}{c}{W/K}        & {m}          & {Meter}     \\
			\midrule
			3.000&0                        & {10.1}       & {}          \\
			3.000&0                        & 10.100       & 10.200000000\\
			3.000&0                        & {ohoh wert}  & 10.340000000\\
			\bottomrule
		\end{tabular}
	\end{subtable}
	\begin{subtable}{0.49\textwidth}
		\centering
		\begin{tabular}{S[table-format=2.3] @{${}\pm{}$} S[table-format=2.3] S[table-format=2.3] S[table-format=1.9] }
			\toprule
			\multicolumn{2}{c}{Messwert 1} & {Messwert 2} & {Messwert 3}\\
			\multicolumn{2}{c}{W/K}        & {m}          & {Meter}     \\
			\midrule
			3.000&0                        & {}           & 3.140000000 \\
			3.100&0                        & {}           & {}          \\
			3.14000 & 0.00100              & {}           & 42.000000000\\
			\bottomrule
		\end{tabular}
	\end{subtable}
\end{table}