forked from amazingfate/help
07bc11ac45
2008/02/11 13:18:32 ufi 1.12.40.2: changed how-to-tables 2008/02/07 14:58:11 fpe 1.12.40.1: script based change of references according to #i85615#
77 lines
6.0 KiB
XML
Executable File
77 lines
6.0 KiB
XML
Executable File
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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***********************************************************************
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: 02010101.xhp,v $fileonly,v $
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*
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* $Revision: 1.13 $
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*
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* last change: $Author: rt $ $Date: 2008-02-20 00:21:59 $
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*
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* The Contents of this file are made available subject to
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* the terms of GNU Lesser General Public License Version 2.1.
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2005 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* MA 02111-1307 USA
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************************************************************************
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-->
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<helpdocument version="1.0">
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<meta>
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<topic id="textsharedexplorerdatabase02010101xml" indexer="include" status="PUBLISH">
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<title id="tit" xml-lang="en-US">Relations</title>
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<filename>/text/shared/explorer/database/02010101.xhp</filename>
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</topic>
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</meta>
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<body>
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<bookmark xml-lang="en-US" branch="index" id="bm_id3154015"><bookmark_value>links;relational databases (Base)</bookmark_value>
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<bookmark_value>inner joins (Base)</bookmark_value>
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<bookmark_value>joins in databases (Base)</bookmark_value>
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<bookmark_value>left joins (Base)</bookmark_value>
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<bookmark_value>right joins (Base)</bookmark_value>
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<bookmark_value>full joins (Base)</bookmark_value>
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</bookmark><comment>mw deleted "join properties" and changed "link properties..." to "links;"</comment><paragraph role="heading" id="hd_id3154015" xml-lang="en-US" level="1" l10n="U" oldref="1">Relations</paragraph>
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<paragraph role="paragraph" id="par_id3151205" xml-lang="en-US" l10n="U" oldref="2">If you double-click a connection between two linked fields in the query design, or if you choose <emph>Insert - New Relation</emph>, the <emph>Relations</emph> dialog appears. These properties will be used in all queries created in the future.</paragraph>
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<section id="howtoget">
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<embed href="text/shared/00/00000450.xhp#Joins"/>
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</section>
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<bookmark xml-lang="en-US" branch="hid/HID_DLG_QRY_LEFT_TABLE" id="bm_id3150749" localize="false"/>
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<bookmark xml-lang="en-US" branch="hid/HID_DLG_QRY_RIGHT_TABLE" id="bm_id3150752" localize="false"/><paragraph role="heading" id="hd_id3155066" xml-lang="en-US" level="2" l10n="U" oldref="17">Tables involved</paragraph>
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<paragraph role="paragraph" id="par_id3153924" xml-lang="en-US" l10n="U" oldref="16"><ahelp hid="HID_DLG_QRY_RIGHT_TABLE">Specifies two different tables that you want to join.</ahelp></paragraph><comment>UFI: removed a help id</comment><paragraph role="heading" id="hd_id3155766" xml-lang="en-US" level="2" l10n="U" oldref="15">Fields involved</paragraph>
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<paragraph role="paragraph" id="par_id3148994" xml-lang="en-US" l10n="CHG" oldref="14"><ahelp hid=".">Specifies two data fields that will be joined by a relation.</ahelp></paragraph>
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<paragraph role="heading" id="hd_id3159267" xml-lang="en-US" level="2" l10n="U" oldref="3">Options</paragraph>
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<bookmark xml-lang="en-US" branch="hid/HID_DLG_QRY_JOINTYPE" id="bm_id3147321" localize="false"/><paragraph role="heading" id="hd_id3147340" xml-lang="en-US" level="3" l10n="U" oldref="13">Type</paragraph>
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<paragraph role="paragraph" id="par_id3152482" xml-lang="en-US" l10n="CHG" oldref="4"><ahelp hid="HID_DLG_QRY_JOINTYPE">Specifies the link type of the selected link.</ahelp> Some databases support only a subset of the possible types.</paragraph>
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<paragraph role="heading" id="hd_id3155334" xml-lang="en-US" level="3" l10n="U" oldref="5">Inner Join</paragraph>
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<paragraph role="paragraph" id="par_id3155936" xml-lang="en-US" l10n="U" oldref="6"><ahelp hid="HID_DLG_QRY_JOINTYPE">With the internal join, the results table contains only the records for which the content of the linked fields is the same.</ahelp> In $[officename] SQL this type of link is created by a corresponding WHERE clause.</paragraph>
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<paragraph role="heading" id="hd_id3156372" xml-lang="en-US" level="3" l10n="U" oldref="7">Left Join</paragraph>
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<paragraph role="paragraph" id="par_id3166450" xml-lang="en-US" l10n="U" oldref="8"><ahelp hid="HID_DLG_QRY_JOINTYPE">With the left join, the results table contains all fields of the left table and only those fields of the right table for which the content of the linked fields is the same.</ahelp> In $[officename] SQL this type of link corresponds to the LEFT OUTER JOIN command.</paragraph>
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<paragraph role="heading" id="hd_id3155607" xml-lang="en-US" level="3" l10n="U" oldref="9">Right Join</paragraph>
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<paragraph role="paragraph" id="par_id3150647" xml-lang="en-US" l10n="U" oldref="10"><ahelp hid="HID_DLG_QRY_JOINTYPE">With the right join, the results table contains all fields of the right table and only those fields of the left table for which the content of the linked fields is the same.</ahelp> In $[officename] SQL this type of link corresponds to the RIGHT OUTER JOIN command.</paragraph>
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<paragraph role="heading" id="hd_id3158215" xml-lang="en-US" level="3" l10n="U" oldref="11">Full Join</paragraph>
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<paragraph role="paragraph" id="par_id3163665" xml-lang="en-US" l10n="U" oldref="12"><ahelp hid="HID_DLG_QRY_JOINTYPE">For a full join, the results table contains all fields of the left and right tables.</ahelp> In the SQL of $[officename] this type of link corresponds to the FULL OUTER JOIN command.</paragraph>
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</body>
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</helpdocument>
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