[DMDB] relational model, relational algebra, SQL very basics

semester4/dmdb/data-modelling-databases-summary.tex

@@ -2,18 +2,24 @@
 
 \input{~/projects/latex/janishutz-helpers.tex}
 
+
 \setupGlossary
 \input{glossary/main.tex}
 \setGlossaryMarkup
 
+
 \usepackage{lmodern}
 \setFontType{sans}
 
+\newcommand{\sql}{\acrshort{sql}}
+
 \setup{Data Modelling \& Databases}
 
 \begin{document}
 \startDocument
 
+\mediumverticalspacing
+
 \vspace{1cm}
 \begin{center}
 	\includegraphics[width=0.5\linewidth]{~/projects/latex/assets/logo.jpg}
@@ -69,9 +75,12 @@ In addition, manual query optimization has to happen again, thus, any change to
 \subsection{Relational Model}
 \bi{This is the focus of this course}
 
+The relational model has the benefit of having data independence: The application doesn't know how the data is stored and represented.
+The queries stay the same, even if the data representation changes.
+In addition, the end user does not have to worry about optimization too much. This, of course, only applies to a limited extent.
 
-\include{parts/00_sql/main.tex}
-\include{parts/01_relational-logic/main.tex}
+\include{parts/00_relational-model_logic/main.tex}
+\include{parts/01_sql/main.tex}
 
 
 \printGlossary