How to make table split in two pages

To switch from a table/tabular combination to a longtable setup, the following adjustments are required:

• delete begin{tabular}{ccc} and change begin{table} to begin{longtable}{ccc};

• delete end{tabular} and change end{table} to end{longtable};

• terminate the caption directive with a double backslash;

• omit the centering directive that's usually provided for tabular material; and

• organize the header and footer material with endhead, endfoot and, if needed, endfirsthead and endlastfoot, directives.

In the following screenshot, the tabular-like material and the positions of the captions look exactly the same for both tables; the first group was generated with a table/tabular combination, whereas the second was generated with a longtable environment.

documentclass{article} 
usepackage{longtable}
usepackage{caption}
begin{document}

begin{table}
centering
caption{With texttt{table} and texttt{tabular} environments}label{tab:a}
begin{tabular}{ccc}
hline
H1 & H2 & H3 
hline
123 & 456 & 789 
hline
end{tabular}
end{table}

begin{longtable}{ccc}

% header and footer information
caption{With texttt{longtable} environment}label{tab:b}
hline
H1 & H2 & H3 
hline
endhead

hline
endfoot

% body of table
123 & 456 & 789 
end{longtable}

end{document}