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<p>The two most important approaches to store data in a warehouse are dimensional and normalized. The dimensional approach uses a <a href="page.php?w=star_schema">star schema</a> as proposed by <a href="page.php?w=Ralph_Kimball">Ralph Kimball</a>. The normalized approach, also called the <a href="page.php?w=third_normal_form">third normal form</a> (3NF) is an entity-relational normalized model proposed by Bill Inmon.</p>

<p><big>Dimensional approach</big></p>
<p>In a <a href="page.php?w=Star_schema">dimensional approach</a>, <a href="page.php?w=transaction_data">transaction data</a></p><p>
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