为表格增加一个标签

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通常，表格采用较多的是标题的方式，有时，对表格制作一个显示标签，以标示表格的主题内容，如下图所示：

代码实现一，采用tikz绘制的方式实现：
\documentclass[a4paper]{article}\usepackage{tikz}\usetikzlibrary{calc, positioning}\begin{document}\begin{tikzpicture}\node[anchor=north west,inner sep=0pt,outer sep=0pt] (A) {\begin{tabular}{|l|l|l|||l|}\hline$\texttt{o\_orderkey}$ & $\texttt{o\_orderdate}$ & $\texttt{o\_custkey}$ & rest \\\hline0 & 1992-01-01   & 100 & A \\1 & 1992-01-15   & 3 & B \\200 & 1993-01-01 & 26 & C \\201 & 1993-01-15 & 42 & D \\300 & 1994-01-01 & 88 & E \\301 & 1994-01-01 & 74 & F \\\hline\end{tabular}};\node[draw, anchor=south west,text depth=0.5ex, inner ysep=2pt,inner xsep=\tabcolsep,outer sep=0pt] at ([yshift=-0.5\pgflinewidth]A.north west) {Table};\end{tikzpicture}\begin{tabular}{|l|l|l|l|||l|}\cline{1-1} Label \\\hline\multicolumn{2}{|l|}{$\texttt{o\_orderkey}$} & $\texttt{o\_orderdate}$ & $\texttt{o\_custkey}$ & rest \\\hline\multicolumn{2}{|l|}{0} & 1992-01-01   & 100 & A \\\multicolumn{2}{|l|}{1} & 1992-01-15   & 3 & B \\\multicolumn{2}{|l|}{200} & 1993-01-01 & 26 & C \\\multicolumn{2}{|l|}{201} & 1993-01-15 & 42 & D \\\multicolumn{2}{|l|}{300} & 1994-01-01 & 88 & E \\\multicolumn{2}{|l|}{301} & 1994-01-01 & 74 & F \\\hline\end{tabular}\end{document}代码实现二，采用caption包定义其caption的样式，代码如下：
\documentclass[a4paper]{article}\usepackage{amsmath}\usepackage{caption}\DeclareCaptionFormat{mine}{\setlength\fboxsep{0pt}\hskip-0.5\arrayrulewidth\fbox{\space#3\space}}\begin{document}\begin{table}\captionsetup{singlelinecheck = false, format = mine, skip =-\arrayrulewidth} \caption{Label}\begin{tabular}{|l|l|l|||l|}\hline\texttt{o\_orderkey} & \texttt{o\_orderdate} & \texttt{o\_custkey} & rest \\\hline0 & 1992-01-01   & 100 & A \\1 & 1992-01-15   & 3 & B \\200 & 1993-01-01 & 26 & C \\201 & 1993-01-15 & 42 & D \\300 & 1994-01-01 & 88 & E \\301 & 1994-01-01 & 74 & F \\\hline\end{tabular}\end{table}\end{document}另外，可以利用表格的单元格来实现其他标签：
\documentclass[a4paper]{article}\usepackage{booktabs,xparse}\DeclareExpandableDocumentCommand{\tablelabel}{O{1}m}{%  \multicolumn{#1}{@{}l@{}}{%    \setlength{\fboxsep}{0pt}%    \setlength{\fboxrule}{\arrayrulewidth}%    \fbox{\hspace{\tabcolsep}\strut#2\hspace{\tabcolsep}}%  }\\[-\arrayrulewidth]}\begin{document}\begin{tabular}{llll}\tablelabel[4]{Label}\toprule\texttt{o\_orderkey} & \texttt{o\_orderdate} & \texttt{o\_custkey} & rest \\\midrule  0 & 1992-01-01 & 100 & A \\  1 & 1992-01-15 &   3 & B \\ 200 & 1993-01-01 &  26 & C \\201 & 1993-01-15 &  42 & D \\300 & 1994-01-01 &  88 & E \\301 & 1994-01-01 &  74 & F \\\bottomrule\end{tabular}\end{document}

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关键词：positioning Document Captions position package document article 工作室 主题 标签