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	<title>Microshell &#187; PostgreSQL</title>
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		<title>Swap values in 2 rows SQL</title>
		<link>http://www.microshell.com/database/sql/swap-values-in-2-rows-sql/</link>
		<comments>http://www.microshell.com/database/sql/swap-values-in-2-rows-sql/#comments</comments>
		<pubDate>Sun, 11 Oct 2009 19:31:20 +0000</pubDate>
		<dc:creator>Maresa</dc:creator>
				<category><![CDATA[General SQL]]></category>
		<category><![CDATA[MySQL]]></category>
		<category><![CDATA[PostgreSQL]]></category>

		<guid isPermaLink="false">http://www.microshell.com/?p=1990</guid>
		<description><![CDATA[I encountered a situation at work that I feel would be a good brain teaser. I was working on a project and needed a way to swap values from 2 different rows in a SQL table. Obviously I can do it on client side (like PHP) to do it; but that wouldn&#8217;t be a good [...]]]></description>
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		<slash:comments>15</slash:comments>
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		<title>Solving sudoku using PostgreSQL PL/pgSQL</title>
		<link>http://www.microshell.com/database/postgresql/solving-sudoku-using-postgresql-plpgsql/</link>
		<comments>http://www.microshell.com/database/postgresql/solving-sudoku-using-postgresql-plpgsql/#comments</comments>
		<pubDate>Wed, 19 Aug 2009 23:09:01 +0000</pubDate>
		<dc:creator>Maresa</dc:creator>
				<category><![CDATA[General / Algorithm]]></category>
		<category><![CDATA[PostgreSQL]]></category>

		<guid isPermaLink="false">http://www.microshell.com/?p=1197</guid>
		<description><![CDATA[I have no idea why I would want to solve sudoku in PostgreSQL PL/pgSQL. My guess would be just for the fun of it. I&#8217;m also hoping that it can serve as a tutorial example in programming PostgreSQL PL/pgSQL.
So what is sudoku? It is basically a number puzzle where the objective is to fill 9&#215;9 [...]]]></description>
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		<title>Comparing data from 2 database tables</title>
		<link>http://www.microshell.com/database/sql/comparing-data-from-2-database-tables/</link>
		<comments>http://www.microshell.com/database/sql/comparing-data-from-2-database-tables/#comments</comments>
		<pubDate>Sun, 01 Mar 2009 10:41:32 +0000</pubDate>
		<dc:creator>Maresa</dc:creator>
				<category><![CDATA[General SQL]]></category>
		<category><![CDATA[MySQL]]></category>
		<category><![CDATA[PostgreSQL]]></category>

		<guid isPermaLink="false">http://www.microshell.com/?p=950</guid>
		<description><![CDATA[During development cycle, I often come to a case where I need to compare two tables whether they are the same or not. For example, if you already have a running script that outputs to a database table in production that was written sub-optimally and you need to improve it. You want to make sure [...]]]></description>
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		<title>Floyd-Warshal algorithm in PostgreSQL PL/pgSQL.</title>
		<link>http://www.microshell.com/programming/floyd-warshal-algorithm-in-postgresql-plpgsql/</link>
		<comments>http://www.microshell.com/programming/floyd-warshal-algorithm-in-postgresql-plpgsql/#comments</comments>
		<pubDate>Sat, 24 Jan 2009 20:04:17 +0000</pubDate>
		<dc:creator>Maresa</dc:creator>
				<category><![CDATA[General / Algorithm]]></category>
		<category><![CDATA[PostgreSQL]]></category>
		<category><![CDATA[Programming]]></category>

		<guid isPermaLink="false">http://www.microshell.com/?p=497</guid>
		<description><![CDATA[This article is an extension of my previous article This time, however, I will write the algorithm completely in PostgreSQL&#8217;s PL/pgSQL. For background information and to understand the premise of this post, please glance through my previous post.
Ok now that you&#8217;re familiar with what we&#8217;re working towards, here&#8217;s my assumption of your database structure:

You have [...]]]></description>
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