<?xml version="1.0"?>
<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en">
	<id>http://dbis-vl2.wikidata.dbis.rwth-aachen.de/index.php?action=history&amp;feed=atom&amp;title=Slide%2FSQL-39</id>
	<title>Slide/SQL-39 - Revision history</title>
	<link rel="self" type="application/atom+xml" href="http://dbis-vl2.wikidata.dbis.rwth-aachen.de/index.php?action=history&amp;feed=atom&amp;title=Slide%2FSQL-39"/>
	<link rel="alternate" type="text/html" href="http://dbis-vl2.wikidata.dbis.rwth-aachen.de/index.php?title=Slide/SQL-39&amp;action=history"/>
	<updated>2026-08-06T01:01:59Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.39.1</generator>
	<entry>
		<id>http://dbis-vl2.wikidata.dbis.rwth-aachen.de/index.php?title=Slide/SQL-39&amp;diff=904&amp;oldid=prev</id>
		<title>Sysop: modified through wikirestore by Sysop</title>
		<link rel="alternate" type="text/html" href="http://dbis-vl2.wikidata.dbis.rwth-aachen.de/index.php?title=Slide/SQL-39&amp;diff=904&amp;oldid=prev"/>
		<updated>2023-04-05T07:15:34Z</updated>

		<summary type="html">&lt;p&gt;modified through wikirestore by Sysop&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;== Links ==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
== Links hierher ==&lt;br /&gt;
{{WhatLinksHere}}&lt;br /&gt;
&amp;lt;pdf page=&amp;#039;39&amp;#039;&amp;gt;4-RelationaleDatenbankspracheSQL.pdf&amp;lt;/pdf&amp;gt;&lt;br /&gt;
= Meta =&lt;br /&gt;
{{Slide&lt;br /&gt;
|qkey=SQL-39&lt;br /&gt;
|pkey=SQL&lt;br /&gt;
|basename=4-RelationaleDatenbankspracheSQL.pptx&lt;br /&gt;
|page=39&lt;br /&gt;
|pdf_page=39&lt;br /&gt;
|name=SQL-39&lt;br /&gt;
|title=Beispiel: Selfjoin&lt;br /&gt;
|keywords=&lt;br /&gt;
|links=&lt;br /&gt;
|literature=&lt;br /&gt;
&lt;br /&gt;
|storemode=property&lt;br /&gt;
}}&lt;br /&gt;
= Text =&lt;br /&gt;
&amp;lt;pre&amp;gt;&lt;br /&gt;
Beispiel: Selfjoin&lt;br /&gt;
Beispiel:•Finde alle Paare von Lieferanten, die eine gleiche Ware liefern.•	•	SELECT DISTINCT L1.LName, L2.LName•		FROM Lieferant L1, Lieferant L2•		WHERE L1.Ware = L2.Ware •			AND L1.LName &amp;lt; L2.LName&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
Verhindert, dass Namenpaare im •Ergebnis doppelt auftauchen &lt;br /&gt;
&lt;br /&gt;
&amp;lt;/pre&amp;gt;&lt;br /&gt;
&amp;lt;headertabs/&amp;gt;&lt;/div&gt;</summary>
		<author><name>Sysop</name></author>
	</entry>
</feed>