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<chapter id="installation">

<title><![%standalone-include[<productname>PostgreSQL</>]]>

an existing installation that does not have a version number of

<quote>&majorversion;.x</quote>, you must back up and restore your

data. If you are upgrading from the same major version, the new version

can use your current data files, soa backup and restore is optional.

If you wish to avoid the backup/restore, merely skip those steps below.

can use your current data files soyou should skip the backup and

restore steps below because they are unnecessary.

</para>

<procedure>