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	<title>edgar.valdez</title>
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	<description>SQL is more than DML statement</description>
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		<title>Knowing unused columns within a table</title>
		<link>http://lagarota.net/2010/01/08/knowing-unused-columns-within-a-table/</link>
		<comments>http://lagarota.net/2010/01/08/knowing-unused-columns-within-a-table/#comments</comments>
		<pubDate>Fri, 08 Jan 2010 19:35:20 +0000</pubDate>
		<dc:creator>Edgar</dc:creator>
				<category><![CDATA[Oracle]]></category>
		<category><![CDATA[SQL]]></category>

		<guid isPermaLink="false">http://lagarota.net/?p=153</guid>
		<description><![CDATA[These are a little scripts that i did at my work, i needed to know all columns that does not has a value (in other words, &#8216;detect&#8217; which columns are not use within the application).
This script requieres the schema and table name and the result will show you which columns are null.
This one requiere the [...]]]></description>
			<content:encoded><![CDATA[<p>These are a little scripts that i did at my work, i needed to know all columns that does not has a value (in other words, &#8216;detect&#8217; which columns are not use within the application).</p>
<p><a href="http://lagarota.net/scripts/tableColumnsNull.sql">This script </a>requieres the schema and table name and the result will show you which columns are null.</p>
<p><a href="http://lagarota.net/scripts/schemaTableColumnsNull.sql">This one </a>requiere the shema name and the result will show you all columns from all tables are null in the given schema.</p>
<p>PD: Scripts only works in Oracle, but it&#8217;s easy to code in any other RDBMS</p>
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