Can anyone help me to adjust following table in two column paper (As did in the picture). I read several solutions here but can't fix this issue. Table should be in top of the two column text and should expand over the two columns. Will be really thankful.
\begin{table}[]
\caption{Ttile}
\label{tab:Comparison}
\begin{tabular}{|l|l|l|l|l|c|c|}
\hline
\textbf{\begin{tabular}[c]{@{}l@{}}Reference and \\ Publication Year\end{tabular}} &
\textbf{Study Focus} &
\textbf{Results and Outcomes} &
\textbf{Artifacts of Investigation} &
\textbf{Method of Investigation} &
\begin{tabular}[c]{@{}c@{}}Manual\\ Efforts\end{tabular} &
\begin{tabular}[c]{@{}c@{}}Tool \\ Support\end{tabular} \\ \hline
\multicolumn{7}{|c|}{\textbf{Repository and Architectural Mining}} \\ \hline
\begin{tabular}[c]{@{}l@{}}{[}1{]}\\ \\ 2018\end{tabular} &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
✔ &
✕ \\ \hline
\begin{tabular}[c]{@{}l@{}}{[}2{]}\\ \\ 2017\end{tabular} &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
✔ &
✕ \\ \hline
\begin{tabular}[c]{@{}l@{}}{[}3{]}\\ \\ 2018\end{tabular} &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
✔ &
✕ \\ \hline
\begin{tabular}[c]{@{}l@{}}{[}12{]}\\ \\ 2020\end{tabular} &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
✔ &
✕ \\ \hline
\multicolumn{7}{|c|}{\textbf{Tools for Static and Dynamic Analysis}} \\ \hline
\begin{tabular}[c]{@{}l@{}}{[}5{]}\\ \\ 2020\end{tabular} &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
✔ &
✕ \\ \hline
\begin{tabular}[c]{@{}l@{}}{[}6{]}\\ \\ 2020\end{tabular} &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
✔ &
✕ \\ \hline
\begin{tabular}[c]{@{}l@{}}{[}9{]}\\ \\ 2020\end{tabular} &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
✔ &
✕ \\ \hline
\begin{tabular}[c]{@{}l@{}}{[}14{]}\\ \\ 2020\end{tabular} &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
✔ &
✕ \\ \hline
\multicolumn{7}{|c|}{\textbf{Practitioner-based Surveys}} \\ \hline
\begin{tabular}[c]{@{}l@{}}{[}4{]}\\ \\ 2019\end{tabular} &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
✕ &
✕ \\ \hline
\begin{tabular}[c]{@{}l@{}}{[}7{]}\\ \\ 2018\end{tabular} &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
✔ &
✔ \\ \hline
\begin{tabular}[c]{@{}l@{}}{[}13{]}\\ \\ 2018\end{tabular} &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
✔ &
✕ \\ \hline
Proposed study &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
Detecting bad smell in MSA code &
✔ &
✕ \\ \hline
\end{tabular}
\end{table}

table*environment? – Bernard Dec 07 '20 at 16:22booktabspackage. – Fran Dec 08 '20 at 18:43