Detailed explanation of Latex multi-row merge/multi-column merge

1. Macro package

Add the macro package before \begin{document}

\usepackage{multirow} 

2. Merge multiple lines

Code
three lines merge

\multirow{3}{*}{a}

example

\begin{center}
	\tabcaption{表}
	\label{tab:2}
	\renewcommand\tabcolsep{1pt}%调整表格长度
	\begin{tabular}
{cccccc}\toprule
        名称&名称&名称&名称&名称& 名称\\\midrule
		\multirow{3}{*}{a}&1&2&3&4&5\\
		&1&2&3&4&5\\
        &1&2&3&4&5\\\bottomrule
\end{tabular}\end{center}

3. Merge multiple columns

Code
to merge four columns

\multicolumn{4}{c}{3}

\begin{center}
	\tabcaption{表}
	\label{tab:2}
	\renewcommand\tabcolsep{1pt}%调整表格长度
	\begin{tabular}
{cccccc}\toprule
        名称&名称&名称&名称&名称& 名称\\\midrule
		\multirow{3}{*}{a}&1&\multicolumn{4}{c}{3}\\
		&1&2&3&4&5\\
        &1&2&3&4&5\\\bottomrule
\end{tabular}\end{center}