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Update FAQ.

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Bruce Momjian
2001-10-13 01:32:47 +00:00
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doc/FAQ
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Frequently Asked Questions (FAQ) for PostgreSQL Frequently Asked Questions (FAQ) for PostgreSQL
Last updated: Sat Sep 22 20:07:41 EDT 2001 Last updated: Fri Oct 12 21:32:36 EDT 2001
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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data types are also subject to compression or being stored out-of-line data types are also subject to compression or being stored out-of-line
by TOAST, so the space on disk might also be less than expected. by TOAST, so the space on disk might also be less than expected.
CHAR() is best when storing strings that are usually the same length.
VARCHAR() is best when storing variable-length strings, but you want
to limit how long a string can be. TEXT is for strings of unlimited
length, maximum 1 gigabyte. BYTEA is for storing binary data,
particularly values that include NULL bytes.
4.16.1) How do I create a serial/auto-incrementing field? 4.16.1) How do I create a serial/auto-incrementing field?
PostgreSQL supports a SERIAL data type. It auto-creates a sequence and PostgreSQL supports a SERIAL data type. It auto-creates a sequence and

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doc/src/FAQ/FAQ.html
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<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1> <H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
<P>Last updated: Sat Sep 22 20:07:41 EDT 2001</P> <P>Last updated: Fri Oct 12 21:32:36 EDT 2001</P>
<P>Current maintainer: Bruce Momjian (<A href= <P>Current maintainer: Bruce Momjian (<A href=
"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR> "mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR>
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stored out-of-line by <SMALL>TOAST</SMALL>, so the space on disk stored out-of-line by <SMALL>TOAST</SMALL>, so the space on disk
might also be less than expected.</P> might also be less than expected.</P>
<P>CHAR() is best when storing strings that are usually the
same length. VARCHAR() is best when storing variable-length strings,
but you want to limit how long a string can be. TEXT is for strings
of unlimited length, maximum 1 gigabyte. BYTEA is for storing
binary data, particularly values that include NULL bytes.</P>
<H4><A name="4.16.1">4.16.1</A>) How do I create a <H4><A name="4.16.1">4.16.1</A>) How do I create a
serial/auto-incrementing field?</H4> serial/auto-incrementing field?</H4>