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	<title>Waldar&#039;s SQLing and Datawarehousing Place &#187; SQL Server</title>
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	<description>SQL behind Business Intelligence</description>
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		<title>Writting Bad Query To Achieve Better Query</title>
		<link>http://www.waldar.org/blog/200909/writting-bad-query-achieve-better-query</link>
		<comments>http://www.waldar.org/blog/200909/writting-bad-query-achieve-better-query#comments</comments>
		<pubDate>Wed, 30 Sep 2009 20:00:50 +0000</pubDate>
		<dc:creator>Waldar</dc:creator>
				<category><![CDATA[SQLing]]></category>
		<category><![CDATA[analytic functions]]></category>
		<category><![CDATA[distinct]]></category>
		<category><![CDATA[group by]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[SQL Server]]></category>

		<guid isPermaLink="false">http://www.waldar.org/blog/?p=538</guid>
		<description><![CDATA[That title is sounding odd I admit it.
In the french forums développez.net there is a regular mistake that I try to emphasize on each time I read it, it's the use of GROUP BY without any aggregate functions to perform a regular DISTINCT operation.
Here's a very simple example (if you're not working on Oracle just [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>NoCOUG SQL Challenge Author Solution, TSQL Challenge #12 !</title>
		<link>http://www.waldar.org/blog/200908/nocoug-sql-challenge-author-solution-tsql-challenge-12</link>
		<comments>http://www.waldar.org/blog/200908/nocoug-sql-challenge-author-solution-tsql-challenge-12#comments</comments>
		<pubDate>Tue, 11 Aug 2009 00:51:29 +0000</pubDate>
		<dc:creator>Waldar</dc:creator>
				<category><![CDATA[SQLing]]></category>
		<category><![CDATA[analytic functions]]></category>
		<category><![CDATA[Challenges]]></category>
		<category><![CDATA[Connect By]]></category>
		<category><![CDATA[NoCOUG]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[SQL Server]]></category>
		<category><![CDATA[TSQL]]></category>

		<guid isPermaLink="false">http://www.waldar.org/blog/?p=401</guid>
		<description><![CDATA[NoCOUG Challenge

After many months, Iggy Fernandez published his own solution of the first annual NoCOUG SQL Challenge.
His solution was performing fast from the beginning according to the graph he sent to Chen Shapira back in the announcement days :

I never managed to achieve those kind of results, only Alberto and André could throw that magnitude [...]]]></description>
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		<slash:comments>6</slash:comments>
		</item>
		<item>
		<title>First International NoCOUG SQL Challenge Is Over !</title>
		<link>http://www.waldar.org/blog/200908/first-international-nocoug-sql-challenge-is-over</link>
		<comments>http://www.waldar.org/blog/200908/first-international-nocoug-sql-challenge-is-over#comments</comments>
		<pubDate>Sat, 01 Aug 2009 13:45:35 +0000</pubDate>
		<dc:creator>Waldar</dc:creator>
				<category><![CDATA[SQLing]]></category>
		<category><![CDATA[Challenges]]></category>
		<category><![CDATA[Model]]></category>
		<category><![CDATA[NoCOUG]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[SQL Server]]></category>

		<guid isPermaLink="false">http://www.waldar.org/blog/?p=392</guid>
		<description><![CDATA[Well, this was a long wait for every participant of this challenge.
I entry the contest in April, and the winner has been announced yesterday by Iggy Fernandez and Chen Shapira.
It was indeed an amazing challenge and I thanks everyone who brought this up.
It was also the key factor for me to open this blog to [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
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		<title>Is Distinct A Synonym To Order By In MS SQL Server ?</title>
		<link>http://www.waldar.org/blog/200907/is-distinct-a-synonym-to-order-by-in-ms-sql-server</link>
		<comments>http://www.waldar.org/blog/200907/is-distinct-a-synonym-to-order-by-in-ms-sql-server#comments</comments>
		<pubDate>Fri, 10 Jul 2009 01:32:00 +0000</pubDate>
		<dc:creator>Waldar</dc:creator>
				<category><![CDATA[SQLing]]></category>
		<category><![CDATA[cte]]></category>
		<category><![CDATA[distinct]]></category>
		<category><![CDATA[Explain plan]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[sort]]></category>
		<category><![CDATA[SQL Server]]></category>
		<category><![CDATA[Tom Kyte]]></category>
		<category><![CDATA[TSQL]]></category>

		<guid isPermaLink="false">http://www.waldar.org/blog/?p=313</guid>
		<description><![CDATA[This afternoon, I was chatting with Antoine Gémis about T-SQL, and this subject came on the table.
He was asking if, in my opinion, using both a distinct and an order by in the same statement would make the query worst due to the fact that distinct is already performing a sort on his own.
Working mostly [...]]]></description>
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		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>I Dislike Guid As Primary Keys</title>
		<link>http://www.waldar.org/blog/200907/i-dislike-guid-as-primary-keys</link>
		<comments>http://www.waldar.org/blog/200907/i-dislike-guid-as-primary-keys#comments</comments>
		<pubDate>Mon, 06 Jul 2009 15:29:47 +0000</pubDate>
		<dc:creator>Waldar</dc:creator>
				<category><![CDATA[Serious]]></category>
		<category><![CDATA[Datawarehouse]]></category>
		<category><![CDATA[Guid]]></category>
		<category><![CDATA[Oracle]]></category>
		<category><![CDATA[primary key]]></category>
		<category><![CDATA[SQL Server]]></category>
		<category><![CDATA[surrogated]]></category>

		<guid isPermaLink="false">http://www.waldar.org/blog/?p=289</guid>
		<description><![CDATA[Damn, I'm currently pushing a small SQL Server application database to an Oracle datawarehouse.
There are guids everywhere, even for a two rows reference table.
This is just so unreadeable and unconfortable to work with.
Try co-working on that kind of database, where you have to dig into the datas to understand them, the design flaws, the weird [...]]]></description>
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		<slash:comments>0</slash:comments>
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