\documentclass{article}
\usepackage{multirow}

\begin{document}

\begin{center}
  \begin{tabular}{||c c c c||}
    \hline
    Col1 & Col2 & Col2  & Col3 \\[0.5ex]
    \hline\hline
    1    & 6    & 87837 & 787 \\
    \hline
    2    & 7    & 78    & 5415 \\
    \hline
    3    & 545  & 778   & 7507 \\
    \hline
    4    & 545  & 18744 & 7560 \\
    \hline
    5    & 88   & 788   & 6344 \\[1ex]
    \hline
  \end{tabular}
\end{center}

\begin{tabular}{ |p{3cm}||p{3cm}|p{3cm}|p{3cm}| }
  \hline
  \multicolumn{4}{|c|}{Country List} \\
  \hline
  Country Name or Area Name& ISO ALPHA 2 Code &ISO ALPHA 3 Code&ISO numeric Code\\
  \hline
  Afghanistan              & AF               &AFG             & 004\\
  Aland Islands            & AX               & ALA            &248\\
  Albania                  &AL                & ALB            & 008\\
  Algeria                  &DZ                & DZA            & 012\\
  American Samoa           & AS               & ASM            &016\\
  Andorra                  & AD               & AND            &020\\
  Angola                   & AO               & AGO            &024\\
  \hline
\end{tabular}

\end{document}
