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Bruce Momjian 2001-10-13 05:27:05 +00:00
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doc/FAQ
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Frequently Asked Questions (FAQ) for PostgreSQL
Last updated: Fri Oct 12 23:53:35 EDT 2001
Last updated: Sat Oct 13 01:26:55 EDT 2001
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
@ -791,10 +791,10 @@ BYTEA bytea variable-length byte array (null-safe)
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.
VARCHAR() is best when storing variable-length strings but it limits
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?

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doc/src/FAQ/FAQ.html
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alink="#0000FF">
<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
<P>Last updated: Fri Oct 12 23:53:35 EDT 2001</P>
<P>Last updated: Sat Oct 13 01:26:55 EDT 2001</P>
<P>Current maintainer: Bruce Momjian (<A href=
"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR>
@ -1003,11 +1003,13 @@ BYTEA bytea variable-length byte array (null-safe)
stored out-of-line by <SMALL>TOAST</SMALL>, so the space on disk
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>
<P><SMALL>CHAR()</SMALL> is best when storing strings that are
usually the same length. <SMALL>VARCHAR()</SMALL> is best when
storing variable-length strings but it limits how long a
string can be. <SMALL>TEXT</SMALL> is for strings of unlimited
length, maximum 1 gigabyte. <SMALL>BYTEA</SMALL> is for storing
binary data, particularly values that include <SMALL>NULL</SMALL>
bytes.</P>
<H4><A name="4.16.1">4.16.1</A>) How do I create a
serial/auto-incrementing field?</H4>