[DMDB] Improved introduction

semester4/dmdb/parts/00_relational-model_logic/main.tex

@@ -1,5 +1,6 @@
 \newsection
 \section{Relational Model, Logic \& Algebra}
+\label{sec:relational-model-logic-algebra}
 \subsection{Relational Model}
 \input{parts/00_relational-model_logic/00_model/00_intro.tex}
 \input{parts/00_relational-model_logic/00_model/01_keys.tex}

semester4/dmdb/parts/08_quick-overview/04_checklist.tex

@@ -2,6 +2,7 @@
 The following things are typically important to know very well (not exhaustive)
 \begin{todolist}
     \item SQL (syntax, some concepts, such as using \texttt{WITH} statements often to make the task more approachable), see Section~\ref{sec:sql-basic-ops}
+    \item Relational Algebra notation, see Section~\ref{sec:relational-model-logic-algebra}
     \item Functional Dependencies (including Candidate Keys, Super Keys, Closures and minimal covers), see Section~\ref{sec:functional-dependency}
     \item Normal Forms (and their Decomposition / Synthesis Algorithms), see Section~\ref{sec:normal-forms}
     \item Time complexities, I/Os and sorted runs for Query Processing, see summarized above, or Section~\ref{sec:query-processing}