forked from amazingfate/help
eb9ec1c794
also remove obsolete l10n attribute (doesn't affect translations/pot) Change-Id: I809866ea7b16cb1cacad9efacb6fdeebae38ea9f
77 lines
7.4 KiB
XML
77 lines
7.4 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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-->
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<helpdocument version="1.0">
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<meta>
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<topic id="textsharedexplorerdatabase05020100xml" indexer="exclude" status="PUBLISH">
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<title id="tit" xml-lang="en-US">Relations</title>
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<filename>/text/shared/explorer/database/05020100.xhp</filename>
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</topic>
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<history>
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<created date="2003-10-31T00:00:00">Sun Microsystems, Inc.</created>
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</history>
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</meta>
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<body>
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<bookmark xml-lang="en-US" branch="hid/.uno:DBAddRelation" id="bm_id3155150" localize="false"/>
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<bookmark xml-lang="en-US" branch="hid/dbaccess/ui/relationdialog/RelationDialog" id="bm_id3155151" localize="false"/>
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<bookmark xml-lang="en-US" branch="index" id="bm_id3150499"><bookmark_value>relations; properties (Base)</bookmark_value>
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<bookmark_value>key fields for relations (Base)</bookmark_value>
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<bookmark_value>cascading update (Base)</bookmark_value>
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</bookmark><comment>mw added "(Base)" to all entries</comment>
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<paragraph role="heading" id="hd_id3150445" xml-lang="en-US" level="1">Relations</paragraph>
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<paragraph role="paragraph" id="par_id3150499" xml-lang="en-US"><ahelp hid=".uno:DBAddRelation">Allows you to define and edit a relation between two tables.</ahelp></paragraph>
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<section id="howtoget">
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<embed href="text/shared/00/00000450.xhp#relationen"/>
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</section>
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<paragraph role="note" id="par_id3155136" xml-lang="en-US">The update and delete options are only available if they are supported by the database used.</paragraph>
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<paragraph role="heading" id="hd_id3155341" xml-lang="en-US" level="2">Tables</paragraph>
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<paragraph role="paragraph" id="par_id3153880" xml-lang="en-US"><ahelp hid="dbaccess/ui/relationdialog/table2" visibility="hidden">This is where the two related tables are listed.</ahelp> If you create a new relation, you can select one table from each of the combo boxes in the top part of the dialog.</paragraph>
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<paragraph role="paragraph" id="par_id3154047" xml-lang="en-US">If you opened the <emph>Relations</emph> dialog for an existing relation by double-clicking the connection lines in the Relation window, then the tables involved in the relation cannot be modified.</paragraph>
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<bookmark xml-lang="en-US" branch="hid/dbaccess/ui/joindialog/relations" id="bm_id3153716" localize="false"/>
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<paragraph role="heading" id="hd_id3153822" xml-lang="en-US" level="2">Key fields</paragraph>
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<paragraph role="paragraph" id="par_id3159157" xml-lang="en-US"><ahelp hid="dbaccess/ui/joindialog/relations">Defines the key fields for the relation.</ahelp></paragraph>
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<bookmark xml-lang="en-US" branch="hid/dbaccess/ui/relationdialog/relations" id="bm_id3153543" localize="false"/>
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<paragraph role="paragraph" id="par_id3149235" xml-lang="en-US"><ahelp hid="dbaccess/ui/relationdialog/table2">The names of the tables selected for the link appear here as column names.</ahelp> If you click a field, you can use the arrow buttons to select a field from the table. Each relation is written in a row.</paragraph>
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<paragraph role="heading" id="hd_id3145609" xml-lang="en-US" level="2">Update options</paragraph>
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<paragraph role="paragraph" id="par_id3153061" xml-lang="en-US">Here you can select options that take effect when there are changes to a primary key field.</paragraph>
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<paragraph role="heading" id="hd_id3149046" xml-lang="en-US" level="3">No action</paragraph>
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<paragraph role="paragraph" id="par_id3152360" xml-lang="en-US"><ahelp hid="dbaccess/ui/relationdialog/addaction">Specifies that any change made to a primary key does not affect other external key fields.</ahelp></paragraph>
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<paragraph role="heading" id="hd_id3148664" xml-lang="en-US" level="3">Updating cascade</paragraph>
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<paragraph role="paragraph" id="par_id3154073" xml-lang="en-US"><ahelp hid="dbaccess/ui/relationdialog/addcascade">Updates all the external key fields if the value of the corresponding primary key has been modified (Cascading Update).</ahelp></paragraph>
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<paragraph role="heading" id="hd_id3145171" xml-lang="en-US" level="3">Set null</paragraph>
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<paragraph role="paragraph" id="par_id3154123" xml-lang="en-US"><ahelp hid="dbaccess/ui/relationdialog/addnull"> If the corresponding primary key has been modified, use this option to set the "IS NULL" value to all external key fields. IS NULL means that the field is empty.</ahelp></paragraph>
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<paragraph role="heading" id="hd_id3150448" xml-lang="en-US" level="3">Set default</paragraph>
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<paragraph role="paragraph" id="par_id3151041" xml-lang="en-US"><ahelp hid="dbaccess/ui/relationdialog/adddefault"> If the corresponding primary key has been modified, use this option to set a default value to all external key fields.</ahelp> During the creation of the corresponding table, the default value of an external key field will be defined when you assign the field properties.</paragraph>
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<paragraph role="heading" id="hd_id3125863" xml-lang="en-US" level="2">Delete options</paragraph>
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<paragraph role="paragraph" id="par_id3153193" xml-lang="en-US">Here you can select options that take effect when a primary key field is deleted.</paragraph>
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<paragraph role="heading" id="hd_id3159252" xml-lang="en-US" level="3">No action</paragraph>
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<paragraph role="paragraph" id="par_id3145785" xml-lang="en-US"><ahelp hid="dbaccess/ui/relationdialog/delaction">Specifies that the deletion of a primary key will not have any effect on other external key fields.</ahelp></paragraph>
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<paragraph role="heading" id="hd_id3154146" xml-lang="en-US" level="3">Delete cascade</paragraph>
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<paragraph role="paragraph" id="par_id3155309" xml-lang="en-US"><ahelp hid="dbaccess/ui/relationdialog/delcascade">Specifies that all external key fields will be deleted if you delete the corresponding primary key field.</ahelp></paragraph>
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<paragraph role="warning" id="par_id3153140" xml-lang="en-US">When you delete a primary key field with the<emph> Delete cascade </emph>option, all records from other tables that have this key as their foreign key are also deleted. Use this option with great care; it is possible that a major portion of the database can be deleted.</paragraph>
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<paragraph role="heading" id="hd_id3152596" xml-lang="en-US" level="3">Set null</paragraph>
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<paragraph role="paragraph" id="par_id3153363" xml-lang="en-US"><ahelp hid="dbaccess/ui/relationdialog/delnull">If you delete the corresponding primary key, the "IS NULL" value will be assigned to all external key fields.</ahelp></paragraph>
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<paragraph role="heading" id="hd_id3145272" xml-lang="en-US" level="3">Set Default</paragraph>
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<paragraph role="paragraph" id="par_id3154320" xml-lang="en-US"><ahelp hid="dbaccess/ui/relationdialog/deldefault">If you delete the corresponding primary key, a set value will be set to all external key fields.</ahelp></paragraph>
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</body>
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</helpdocument>
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