Greg Sabino Mullane wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
>
> Added a new question about sorting with a NULL. Also some minor
> cleanups, especially in regards to some of the http links: is
> some automatic tool messing these up somehow? (many had spaces
> and odd breaks in the middle)
The original is actually in HTML in doc/src/FAQ/FAQ.html. I made the
modifications you suggested in the patch and am attaching the diff.
One problem is wrapping of URL's. Most are fixed now but I saw at least
on that is still wrapped in the text version. I use this command for
the HTML to text conversion:
lynx -force_html -dont_wrap_pre -dump -hiddenlinks=ignore -nolist "$@"
Any ideas on how that can be improved?
--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
Index: FAQ.html
===================================================================
RCS file: /cvsroot/pgsql/doc/src/FAQ/FAQ.html,v
retrieving revision 1.288
retrieving revision 1.291
diff -c -c -r1.288 -r1.291
*** FAQ.html 15 Feb 2005 04:35:37 -0000 1.288
--- FAQ.html 25 Feb 2005 00:45:30 -0000 1.291
***************
*** 10,16 ****
alink="#0000ff">
<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
! <P>Last updated: Mon Feb 14 23:35:09 EST 2005</P>
<P>Current maintainer: Bruce Momjian (<A href=
"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)
--- 10,16 ----
alink="#0000ff">
<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
! <P>Last updated: Thu Feb 24 19:45:40 EST 2005</P>
<P>Current maintainer: Bruce Momjian (<A href=
"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)
***************
*** 85,91 ****
searches and case-insensitive regular expression searches? How do I
use an index for case-insensitive searches?<BR>
<A href="#4.9">4.9</A>) In a query, how do I detect if a field
! is <SMALL>NULL</SMALL>?<BR>
<A href="#4.10">4.10</A>) What is the difference between the
various character types?<BR>
<A href="#4.11.1">4.11.1</A>) How do I create a
--- 85,92 ----
searches and case-insensitive regular expression searches? How do I
use an index for case-insensitive searches?<BR>
<A href="#4.9">4.9</A>) In a query, how do I detect if a field
! is <SMALL>NULL</SMALL>? How can I sort on whether a field is <SMALL>
! NULL</SMALL> or not?<BR>
<A href="#4.10">4.10</A>) What is the difference between the
various character types?<BR>
<A href="#4.11.1">4.11.1</A>) How do I create a
***************
*** 162,168 ****
<P>PostgreSQL Data Base Management System</P>
<P>Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
! Portions Copyright (c) 1994-6 Regents of the University of California</P>
<P>Permission to use, copy, modify, and distribute this software
and its documentation for any purpose, without fee, and without a
--- 163,169 ----
<P>PostgreSQL Data Base Management System</P>
<P>Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
! Portions Copyright (c) 1994-1996 Regents of the University of California</P>
<P>Permission to use, copy, modify, and distribute this software
and its documentation for any purpose, without fee, and without a
***************
*** 206,212 ****
<H4><A name="1.4">1.4</A>) Where can I get PostgreSQL?</H4>
<P>The primary anonymous ftp site for PostgreSQL is <A href=
! "ftp://ftp.PostgreSQL.org/pub">ftp://ftp.PostgreSQL.org/pub</A>.
For mirror sites, see our main web site.</P>
<H4><A name="1.5">1.5</A>) Where can I get support?</H4>
--- 207,213 ----
<H4><A name="1.4">1.4</A>) Where can I get PostgreSQL?</H4>
<P>The primary anonymous ftp site for PostgreSQL is <A href=
! "ftp://ftp.PostgreSQL.org/pub/">ftp://ftp.PostgreSQL.org/pub/</A>.
For mirror sites, see our main web site.</P>
<H4><A name="1.5">1.5</A>) Where can I get support?</H4>
***************
*** 225,232 ****
(<I>#postgresqlfr</I>). There is also a PostgreSQL channel on EFNet.
<P>A list of commercial support companies is available at <A href=
! "http://techdocs.postgresql.org/companies.php">http://techdocs.postg
! resql.org/companies.php</A>.</P>
<H4><A name="1.6">1.6</A>) How do I submit a bug report?</H4>
--- 226,233 ----
(<I>#postgresqlfr</I>). There is also a PostgreSQL channel on EFNet.
<P>A list of commercial support companies is available at <A href=
! "http://techdocs.postgresql.org/companies.php">
! http://techdocs.postgresql.org/companies.php</A>.</P>
<H4><A name="1.6">1.6</A>) How do I submit a bug report?</H4>
***************
*** 235,241 ****
http://www.postgresql.org/support/submitbug</A>.</P>
<P>Also check out our ftp site <A href=
! "ftp://ftp.PostgreSQL.org/pub">ftp://ftp.PostgreSQL.org/pub</A> to
see if there is a more recent PostgreSQL version.</P>
<H4><A name="1.7">1.7</A>) What is the latest release?</H4>
--- 236,242 ----
http://www.postgresql.org/support/submitbug</A>.</P>
<P>Also check out our ftp site <A href=
! "ftp://ftp.PostgreSQL.org/pub/">ftp://ftp.PostgreSQL.org/pub/</A> to
see if there is a more recent PostgreSQL version.</P>
<H4><A name="1.7">1.7</A>) What is the latest release?</H4>
***************
*** 411,417 ****
href="http://www.php.net">http://www.php.net</A>) is an excellent
interface.</P>
! <P>For complex cases, many use the Perl and CGI.pm or mod_perl.</P>
<H4><A name="2.3">2.3</A>) Does PostgreSQL have a graphical user
interface?</H4>
--- 412,419 ----
href="http://www.php.net">http://www.php.net</A>) is an excellent
interface.</P>
! <P>For complex cases, many use the Perl and DBD::Pg with CGI.pm or
! mod_perl.</P>
<H4><A name="2.3">2.3</A>) Does PostgreSQL have a graphical user
interface?</H4>
***************
*** 421,430 ****
href="http://www.pgadmin.org">http://www.pgadmin.org</a>, PgAccess
<a href="http://www.pgaccess.org"> http://www.pgaccess.org</a>),
RHDB Admin (<a
! href="http://sources.redhat.com/rhdb/">http://sources.redhat.com/rhd
! b/ </a>), TORA (<a
! href="http://www.globecom.net/tora/">http://www.globecom.net/tora/</a>,
! partly commercial), and Rekall (<a
href="http://www.rekallrevealed.org/">
http://www.rekallrevealed.org/</a>). There is also PhpPgAdmin (<a
href="http://phppgadmin.sourceforge.net/">
--- 423,431 ----
href="http://www.pgadmin.org">http://www.pgadmin.org</a>, PgAccess
<a href="http://www.pgaccess.org"> http://www.pgaccess.org</a>),
RHDB Admin (<a
! href="http://sources.redhat.com/rhdb/">http://sources.redhat.com/rhdb/
! </a>), TORA (<a href="http://www.globecom.net/tora/">
! http://www.globecom.net/tora/</a>, partly commercial), and Rekall (<a
href="http://www.rekallrevealed.org/">
http://www.rekallrevealed.org/</a>). There is also PhpPgAdmin (<a
href="http://phppgadmin.sourceforge.net/">
***************
*** 815,825 ****
</PRE>
<H4><A name="4.9">4.9</A>) In a query, how do I detect if a field
! is <SMALL>NULL</SMALL>?</H4>
<P>You test the column with <SMALL>IS NULL</SMALL> and <SMALL>IS
NOT NULL</SMALL>.</P>
<H4><A name="4.10">4.10</A>) What is the difference between the
various character types?</H4>
<BLOCKQUOTE>
--- 816,844 ----
</PRE>
<H4><A name="4.9">4.9</A>) In a query, how do I detect if a field
! is <SMALL>NULL</SMALL>? How can I sort on whether a field is <SMALL>
! NULL</SMALL> or not?</H4>
<P>You test the column with <SMALL>IS NULL</SMALL> and <SMALL>IS
NOT NULL</SMALL>.</P>
+ <PRE>
+ SELECT *
+ FROM tab
+ WHERE col IS NULL;
+ </PRE>
+
+ <P>To sort by the <SMALL>NULL</SMALL> status, use the <SMALL>IS NULL</SMALL>
+ and <SMALL>IS NOT NULL</SMALL> modifiers in your <SMALL>WHERE</SMALL> clause.
+ Things that are <I>true</I> will sort higher than things that are <I>false</I>,
+ so the following will put NULL entries at the top of the resulting list:</P>
+
+ <PRE>
+ SELECT *
+ FROM tab
+ ORDER BY (col IS NOT NULL)
+ </PRE>
+
<H4><A name="4.10">4.10</A>) What is the difference between the
various character types?</H4>
<BLOCKQUOTE>
