Sophie: postgresql8.4-docs-8.4.12-0.1mdv2010.2 i586

postgresql8.4-docs-8.4.12-0.1mdv2010.2.i586.rpm

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>Indexes</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REV="MADE"
HREF="mailto:pgsql-docs@postgresql.org"><LINK
REL="HOME"
TITLE="PostgreSQL 8.4.12 Documentation"
HREF="index.html"><LINK
REL="UP"
TITLE="The SQL Language"
HREF="sql.html"><LINK
REL="PREVIOUS"
TITLE="UNION, CASE, and Related Constructs"
HREF="typeconv-union-case.html"><LINK
REL="NEXT"
TITLE="Introduction"
HREF="indexes-intro.html"><LINK
REL="STYLESHEET"
TYPE="text/css"
HREF="stylesheet.css"><META
HTTP-EQUIV="Content-Type"
CONTENT="text/html; charset=ISO-8859-1"><META
NAME="creation"
CONTENT="2012-05-31T23:30:11"></HEAD
><BODY
CLASS="CHAPTER"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="5"
ALIGN="center"
VALIGN="bottom"
>PostgreSQL 8.4.12 Documentation</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
HREF="typeconv-union-case.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
HREF="typeconv.html"
>Fast Backward</A
></TD
><TD
WIDTH="60%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="top"
><A
HREF="textsearch.html"
>Fast Forward</A
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="top"
><A
HREF="indexes-intro.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="CHAPTER"
><H1
><A
NAME="INDEXES"
></A
>Chapter 11. Indexes</H1
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
>11.1. <A
HREF="indexes-intro.html"
>Introduction</A
></DT
><DT
>11.2. <A
HREF="indexes-types.html"
>Index Types</A
></DT
><DT
>11.3. <A
HREF="indexes-multicolumn.html"
>Multicolumn Indexes</A
></DT
><DT
>11.4. <A
HREF="indexes-ordering.html"
>Indexes and <TT
CLASS="LITERAL"
>ORDER BY</TT
></A
></DT
><DT
>11.5. <A
HREF="indexes-bitmap-scans.html"
>Combining Multiple Indexes</A
></DT
><DT
>11.6. <A
HREF="indexes-unique.html"
>Unique Indexes</A
></DT
><DT
>11.7. <A
HREF="indexes-expressional.html"
>Indexes on Expressions</A
></DT
><DT
>11.8. <A
HREF="indexes-partial.html"
>Partial Indexes</A
></DT
><DT
>11.9. <A
HREF="indexes-opclass.html"
>Operator Classes and Operator Families</A
></DT
><DT
>11.10. <A
HREF="indexes-examine.html"
>Examining Index Usage</A
></DT
></DL
></DIV
><A
NAME="AEN18906"
></A
><P
>  Indexes are a common way to enhance database performance.  An index
  allows the database server to find and retrieve specific rows much
  faster than it could do without an index.  But indexes also add
  overhead to the database system as a whole, so they should be used
  sensibly.
 </P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="typeconv-union-case.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="indexes-intro.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><TT
CLASS="LITERAL"
>UNION</TT
>, <TT
CLASS="LITERAL"
>CASE</TT
>, and Related Constructs</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="sql.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>Introduction</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>