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Revert ORDBMS change, per Peter.
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/query.sgml,v 1.31 2003/06/24 23:26:46 momjian Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/query.sgml,v 1.32 2003/06/24 23:27:24 momjian Exp $
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-->
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<chapter id="tutorial-sql">
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@ -61,8 +61,8 @@ $Header: /cvsroot/pgsql/doc/src/sgml/query.sgml,v 1.31 2003/06/24 23:26:46 momji
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<indexterm><primary>relation</primary></indexterm>
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<indexterm><primary>table</primary></indexterm>
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<productname>PostgreSQL</productname> is a <firstterm>object relational
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database management system</firstterm> (<acronym>ORDBMS</acronym>).
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<productname>PostgreSQL</productname> is a <firstterm>relational
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database management system</firstterm> (<acronym>RDBMS</acronym>).
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That means it is a system for managing data stored in
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<firstterm>relations</firstterm>. Relation is essentially a
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mathematical term for <firstterm>table</firstterm>. The notion of
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