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Attached is a small patch for the Reference Manual which adds

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information about nulls and sort order.

This is based on information obtained from Peter Eisentraut and
Tom Lane on pgsql-hackers.

Please check my English and Docbook markup, as both are a second
language to me.

Rene Pijlman
This commit is contained in:
Bruce Momjian 2001-10-31 04:50:52 +00:00
parent 4911c85e86
commit 85801ed9b8
1 changed files with 8 additions and 1 deletions
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9
doc/src/sgml/ref/select.sgml
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@ -1,5 +1,5 @@
<!-- <!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/select.sgml,v 1.49 2001/10/23 16:42:36 momjian Exp $ $Header: /cvsroot/pgsql/doc/src/sgml/ref/select.sgml,v 1.50 2001/10/31 04:50:52 momjian Exp $
Postgres documentation Postgres documentation
--> -->
@ -601,6 +601,13 @@ SELECT name FROM distributors ORDER BY code;
specific ordering operator name may be specified. ASC is equivalent specific ordering operator name may be specified. ASC is equivalent
to USING &lt; and DESC is equivalent to USING &gt;. to USING &lt; and DESC is equivalent to USING &gt;.
</para> </para>
<para>
The null value sorts higher than any other value in a domain. In other
words, with ascending sort order nulls sort at the end and with
descending sort order nulls sort at the beginning.
</para>
</refsect2> </refsect2>
<refsect2 id="SQL-UNION"> <refsect2 id="SQL-UNION">