deletions | additions       diff --git a/section_Query_Optimization_and_Execution__.tex b/section_Query_Optimization_and_Execution__.tex  index f12d21f..4ec42c1 100644  --- a/section_Query_Optimization_and_Execution__.tex  +++ b/section_Query_Optimization_and_Execution__.tex 
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\subsection{Join Query Execution Plans}  Consider query   \begin{verbatim}  SELECT * FROM A JOIN B ON A.ID = B.ID JOIN C ON A.ID = C.ID JOIN D ON A.ID = D.ID \end{verbatim}