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	<title>Oracle Pills</title>
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		<title>The biggest problem of Computer Science</title>
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		<pubDate>Thu, 17 Sep 2009 21:01:44 +0000</pubDate>
		<dc:creator>lascoltodelvenerdi</dc:creator>
				<category><![CDATA[Philosophy]]></category>

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		<description><![CDATA[Why there are so many problems in Computer Science? I means, why buffer overflow? Why sql-injection? Why XSS? The answer is simple: because we know computer science, but we don&#8217;t know &#8220;good&#8221; computer science. &#8220;Teachers&#8221; usually teach the easiest way to do something not the &#8220;good&#8221; one. Just an example, when you learn how to [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=oraclepills.wordpress.com&amp;blog=874396&amp;post=20&amp;subd=oraclepills&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>A look at an Oracle instance</title>
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		<pubDate>Sun, 27 Jul 2008 19:57:46 +0000</pubDate>
		<dc:creator>lascoltodelvenerdi</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Oracle Basics]]></category>
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		<description><![CDATA[When you install Oracle, on a very high abstraction level, you copy files to your HD. Nothing more nothing less. After this process, you got an Oracle installation: a system, with at least one directory where Oracle’s programs reside, but you don’t have any Instance. An Oracle Instance is the software (and memory) that Oracle [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=oraclepills.wordpress.com&amp;blog=874396&amp;post=10&amp;subd=oraclepills&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>Oracle, what?</title>
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		<pubDate>Sat, 07 Jun 2008 21:32:14 +0000</pubDate>
		<dc:creator>lascoltodelvenerdi</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Oracle Basics]]></category>
		<category><![CDATA[relational model]]></category>

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		<description><![CDATA[Oracle is a relational data base (DB).It is a program that use the relational model (proposed in 1969 by Edgard Codd) based on predicate logic and set theory. Table&#8217;s data are treated as sets: so you can have the set of users, the set of employees, the set of books, the set of cars etc. [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=oraclepills.wordpress.com&amp;blog=874396&amp;post=8&amp;subd=oraclepills&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>An Oracle blog on the basic</title>
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		<pubDate>Sun, 04 May 2008 16:43:30 +0000</pubDate>
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				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[Oracle Basics]]></category>
		<category><![CDATA[Oracle DB]]></category>

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		<description><![CDATA[Yep! Finally I found a motivation to work again on this blog. The idea is to write on basic Oracle concept and to create a kind of &#8220;Introduction to Oracle&#8221;. Hope that it will help.<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=oraclepills.wordpress.com&amp;blog=874396&amp;post=7&amp;subd=oraclepills&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>A new Begin</title>
		<link>http://oraclepills.wordpress.com/2008/04/18/a-new-begin/</link>
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		<pubDate>Thu, 17 Apr 2008 22:01:08 +0000</pubDate>
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				<category><![CDATA[Oracle Basics]]></category>

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		<description><![CDATA[After more than one year I decide to restart this blog! Now, here I want to talk about Oracle basic concepts. Hope to bring a bit of fun in Oracle Universe! ^_^ So this is a new Begin, with the hope that it will not be just: Begin Null; End; /<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=oraclepills.wordpress.com&amp;blog=874396&amp;post=6&amp;subd=oraclepills&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>Multitable Insert</title>
		<link>http://oraclepills.wordpress.com/2007/03/22/multitable-insert/</link>
		<comments>http://oraclepills.wordpress.com/2007/03/22/multitable-insert/#comments</comments>
		<pubDate>Thu, 22 Mar 2007 15:43:45 +0000</pubDate>
		<dc:creator>oraclepills</dc:creator>
				<category><![CDATA[Weird things (bugs?)]]></category>

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		<description><![CDATA[So, let&#8217;s start with two normal inserts: insert into tab1 select 1,1,&#8217;first&#8217; from dual and insert into tab2 select 1,1,&#8217;first&#8217; from dual this work fine, but we got Oracle 9 and 10 nowadays so we can: Insert all into tab1 into tab2 select 1,1,&#8217;first&#8217; from dual and this give us: ORA-00918: column ambiguously defined A [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=oraclepills.wordpress.com&amp;blog=874396&amp;post=5&amp;subd=oraclepills&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>Explain me!</title>
		<link>http://oraclepills.wordpress.com/2007/03/21/explain-me/</link>
		<comments>http://oraclepills.wordpress.com/2007/03/21/explain-me/#comments</comments>
		<pubDate>Wed, 21 Mar 2007 10:53:15 +0000</pubDate>
		<dc:creator>oraclepills</dc:creator>
				<category><![CDATA[Tuning]]></category>

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		<description><![CDATA[This query is slow! (copyright by my Boss) But how can you examine what&#8217;s going on? Can you &#8220;see&#8221; what Oracle is thinking? Yes you can! We can explain the execution plan (i.e. what the DB is going do to) by using the explain plan sql command. Naturally if you use Sql*Navigator or Toad or [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=oraclepills.wordpress.com&amp;blog=874396&amp;post=4&amp;subd=oraclepills&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>V$iews</title>
		<link>http://oraclepills.wordpress.com/2007/03/15/views/</link>
		<comments>http://oraclepills.wordpress.com/2007/03/15/views/#comments</comments>
		<pubDate>Thu, 15 Mar 2007 13:21:59 +0000</pubDate>
		<dc:creator>oraclepills</dc:creator>
				<category><![CDATA[Internals]]></category>

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		<description><![CDATA[Oracle, as any other DBs, has got a Catalog: internal tables and views that give you information about tables, users, sessions and so on. One subset is the v$ views (v$iews for short) subset. V$iews are dynamic views used to track down performance problems. A little example: your PL/SQL program seems to be stuck on [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=oraclepills.wordpress.com&amp;blog=874396&amp;post=3&amp;subd=oraclepills&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>Hello world!</title>
		<link>http://oraclepills.wordpress.com/2007/03/14/hello-world/</link>
		<comments>http://oraclepills.wordpress.com/2007/03/14/hello-world/#comments</comments>
		<pubDate>Wed, 14 Mar 2007 11:23:42 +0000</pubDate>
		<dc:creator>oraclepills</dc:creator>
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		<description><![CDATA[So here we go! First Blog! First Post! First all! More  or less the start of an adventure!<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=oraclepills.wordpress.com&amp;blog=874396&amp;post=1&amp;subd=oraclepills&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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