[DMDB] SQL intro (DML, DDL)

semester4/dmdb/parts/01_sql/00_intro.tex

@@ -5,5 +5,9 @@ people deviate from it and new standards form.
 
 Even though \textit{most} \acrshort{sql} databases support the standard SQL operations, many have added a lot of features on top.
 
-\sql\ is split up into the query language itself, used to operate on data, as well as the Data Definition Language,
-used to create, modify and delete schemas.
+\sql\ is split up into the following parts:
+\begin{itemize}
+\item Data Definition Language, used to create, modify and delete schemas.
+\item Data Manipulation Language, used to insert, update and delete data
+\item Query Language, used to retrieve data
+\end{itemize}