Section, sidewaystable and page break

Question

I have a sidewaystable in an appendix and now I would like to insert headings on the page for better clarity. sidewaystable automatically causes a page break. So, I tried the rotate package which led to display errors:

table moves beyond the heading.

Could someone please help me inserting a heading on the page and immediately below the table?

\documentclass[a4paper]{scrbook}
\usepackage[utf8]{inputenc}

\usepackage{textcomp}

\usepackage[T1]{fontenc}

\usepackage[english]{babel}

\usepackage{ragged2e}

\usepackage{everysel}

\usepackage{footmisc}

\usepackage{multirow}
\usepackage{booktabs}

\usepackage{float}

\usepackage{threeparttable}

\usepackage[referable]{threeparttablex}
\usepackage{pdflscape}
\usepackage{lscape}
\usepackage{tabularx}
\usepackage{tabulary}
\usepackage{longtable}
\usepackage{afterpage}

\usepackage{tabu}
\usepackage{adjustbox}
\usepackage{array}
\usepackage[figuresright]{rotating}
\usepackage[section]{placeins}

\usepackage[format=hang,
            justification=RaggedRight,

            singlelinecheck=off,

            labelfont=bf,

            font=footnotesize,
            textfont=footnotesize,
            twoside,
            labelsep=colon
            ]{caption}

\usepackage[language=autobib,
    backend=biber                               %%%% switch on/off 
    ]{biblatex}
%%% Minitab
\newcommand{\minitab}[2][l]{\begin{tabular}{#1}#2\end{tabular}}
%%%
%%% Mod ThreePartTable
\makeatletter 
\g@addto@macro\TPT@defaults{\scriptsize}
\makeatother
%%%
%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
\section*{Section}
\begin{sidewaystable}
\begin{threeparttable}
\caption[xxx]
{\textbf{xxx}}
\centering
\small
\begin{tabularx}{\textwidth}
{
X
>{\raggedleft\arraybackslash}p{12ex} 
>{\raggedleft\arraybackslash}p{12ex} 
p{0.5ex} |

>{\raggedleft\arraybackslash}p{10.5ex} 
p{0.25ex}
%
>{\raggedleft\arraybackslash}p{12ex} 
>{\raggedleft\arraybackslash}p{12ex} 
p{0.5ex} |

>{\raggedleft\arraybackslash}p{10.5ex} 
p{0.25ex}
%
}
\toprule
& \multicolumn{4}{c}{group 1} 
&
%
& \multicolumn{4}{c}{group 2} 
&
\
\cmidrule(lr){2-5} 
\cmidrule(lr){7-10}
& \multicolumn{3}{c}{yyy\tnote{a}}

& \multirow[b]{2}{}{\minitab[c]{zzz\rrr\tnote{b}}}

&
%
& \multicolumn{3}{c}{yyy\tnote{a}}

& \multirow[b]{2}{}{\minitab[c]{zzz\rrr\tnote{c}}}

&
%
\
\cmidrule(lr){2-4}
\cmidrule(lr){7-9}
& n 
& %

& 
&
&
%
& n
& %
& 
&
&
\
\midrule
xxx         &   20      &   24,4%      &&  80,0,%    &
                &   24      &   23,5,%        &&  85,7,%    &
                \
\midrule
Total           &   82      &   100,0,%       &&  328,0,%   &
                &   102     &   100,0,%       &&  364,3,%   &
                \
\bottomrule
\end{tabularx}
%%%%%%%%%%%%%%%%%
\begin{tablenotes}
\scriptsize
\justifying
\RaggedRight
\item[a] AAAAAAA
\end{tablenotes}
%%%%%%%%%%%%%%%%%
\end{threeparttable}
\end{sidewaystable}
\end{document}

Answer 1

Below I forego the use of threeparttable, setting the \tnotes as \textsuperscript. The important, structural thing is to use the following setup:

\begin{center}% Center table horizontally
  \rotatebox{90}{% Rotate table 90 degrees (anti-clockwise)
    % In order to rotate something, it's often best to place it inside a box-like structure,
    % like a minipage
    \begin{minipage}{\textwidth}
      % With the float package, you can turn a float into a non-float via the [H]ERE
      % float specifier. This is needed because you're placing the float inside a box (a
      % minipage), yet want float-like capabilities (like \caption).
      \begin{table}[H]
        <your table>
      \end{table}
    \end{minipage}%
  }
\end{center}

Here's a complete working example:

\documentclass[a4paper]{scrbook}
\usepackage{ragged2e}
\usepackage{multirow}
\usepackage{booktabs,graphicx}
\usepackage{tabularx,float}
\usepackage{array}
\newcommand{\minitab}[2][l]{\begin{tabular}{#1}#2\end{tabular}}
\newcommand{\tnote}{\textsuperscript}
\begin{document}
\section*{Section}
\begin{center}
  \rotatebox{90}{%
    \begin{minipage}{\textwidth}
      \begin{table}[H]
        \centering
        \small
        \caption[xxx]{\bfseries xxx}
        \begin{tabularx}{\textwidth}{
          X
          >{\raggedleft\arraybackslash}p{12ex} 
          >{\raggedleft\arraybackslash}p{12ex} 
          p{0.5ex} |

          >{\raggedleft\arraybackslash}p{10.5ex} 
          p{0.25ex}
          %
          >{\raggedleft\arraybackslash}p{12ex} 
          >{\raggedleft\arraybackslash}p{12ex} 
          p{0.5ex} |

          >{\raggedleft\arraybackslash}p{10.5ex} 
          p{0.25ex}
          %
        }
          \toprule
          & \multicolumn{4}{c}{group 1} 
          &
          %
          & \multicolumn{4}{c}{group 2} 
          &
          \
      \cmidrule(lr){2-5} 
      \cmidrule(lr){7-10}

      & \multicolumn{3}{c}{yyy\tnote{a}}
      & \multirow[b]{2}{*}{\minitab[c]{zzz\\rrr\tnote{b}}}
      &
      %
      & \multicolumn{3}{c}{yyy\tnote{a}}
      & \multirow[b]{2}{*}{\minitab[c]{zzz\\rrr\tnote{c}}}
      &
      %
      \\

      \cmidrule(lr){2-4}
      \cmidrule(lr){7-9}


      & n 
      & \%        
      & 
      &
      &
      %
      & n
      & \%
      & 
      &
      &

      \\

      \midrule
      xxx         &   20      &   24,4\%      &&  80,0\,\%    &
                      &   24      &   23,5\,\%        &&  85,7\,\%    &
                      \\

      \midrule
      Total           &   82      &   100,0\,\%       &&  328,0\,\%   &
                      &   102     &   100,0\,\%       &&  364,3\,\%   &
                      \\

      \bottomrule
    \end{tabularx}

    \scriptsize
    \RaggedRight
    \tnote{a} AAAAAAA
  \end{table}%
\end{minipage}

}
\end{center}
\end{document}