Latex Table

\usepackage{multirow}
\usepackage{multicol}
\usepackage{makecell}
\usepackage{array}

\newcolumntype{C}[1]{>{\centering\arraybackslash}m{#1}}

• C{2cm}: centered column with 2 cm width
• \multicolumn{3}{c}{Text}
  • \multicolumn{3}{|c|}{Text}：with border
• \multirow{3}{*}{Text}

• \toprule、\midrule、\buttomrule
• \checkmark
• \quad、\qquad

Big Table

REF: How do I change column or row separation in LaTeX tables?

\begin{table*}
\centering
\setlength{\tabcolsep}{1.7pt}
\renewcommand{\arraystretch}{1}
\begin{tabular}{}


\end{tabular}
\end{table*}

• \setlength{\tabcolsep}{1.7pt}: horizontal spacing (column separation)
• \renewcommand{\arraystretch}{1}: the vertical spacing (row separation)