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)
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?
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>
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>