documentclass[twocolumn,a4paper]{article}
usepackage{multirow}
begin{document}

begin{table}[h]
begin{tabular}{c|c|c|c|c}
hline
 multirow{2}{*}{Types}  & multicolumn{4}{c}{Days} \ cline{2-5}
                     & Day 1   & Day 2 & Day 3 &  Day 4  \ hline
             Type 1   & 12-06-08-07-09-08-18-32-48-101-108& 13-88-08-07-09-08-14-39-36-10 & 56-33-08-07-09-08-18-32-48&26-29-26\ hline
             Type 2   & 01-07-10-22-55-07-100-32-48& 08-18-32-48-66-36-10 &26-29-26& 10-55-21\ hline

end{tabular}
end{table}
end{document}

documentclass[twocolumn,a4paper]{article}
usepackage{multirow,tabularx}
newcolumntype{C}{>{centeringarraybackslash}X}
begin{document}
begin{table*}
begin{tabularx}{textwidth}{@{} l|C|C|C|C @{}}
 hline
 multirow{2}{*}{Types} & multicolumn{4}{c}{Days} \
 cline{2-5}
     & Day 1  & Day 2 & Day 3 &  Day 4  \ hline
     Type 1   & 12-06-08-07-09-08-18-32-48-101-108& 13-88-08-07-09-08-14-39-36-10 & 56-33-08-07-09-08-18-32-48&26-29-26\ hline
     Type 2   & 01-07-10-22-55-07-100-32-48& 08-18-32-48-66-36-10 &26-29-26& 10-55-21\
 hline
end{tabularx}
end{table*}
end{document}