1*b1cdbd2cSJim Jagielski<?xml version="1.0" encoding="UTF-8"?> 2*b1cdbd2cSJim Jagielski<helpdocument version="1.0"> 3*b1cdbd2cSJim Jagielski 4*b1cdbd2cSJim Jagielski<!--*********************************************************** 5*b1cdbd2cSJim Jagielski * 6*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one 7*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file 8*b1cdbd2cSJim Jagielski * distributed with this work for additional information 9*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file 10*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the 11*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance 12*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at 13*b1cdbd2cSJim Jagielski * 14*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0 15*b1cdbd2cSJim Jagielski * 16*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing, 17*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an 18*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 19*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the 20*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations 21*b1cdbd2cSJim Jagielski * under the License. 22*b1cdbd2cSJim Jagielski * 23*b1cdbd2cSJim Jagielski ***********************************************************--> 24*b1cdbd2cSJim Jagielski 25*b1cdbd2cSJim Jagielski 26*b1cdbd2cSJim Jagielski 27*b1cdbd2cSJim Jagielski 28*b1cdbd2cSJim Jagielski<meta> 29*b1cdbd2cSJim Jagielski<topic id="textsharedexplorerdatabase05020000xml" indexer="include"> 30*b1cdbd2cSJim Jagielski<title id="tit" xml-lang="en-US">Relations</title> 31*b1cdbd2cSJim Jagielski<filename>/text/shared/explorer/database/05020000.xhp</filename> 32*b1cdbd2cSJim Jagielski</topic> 33*b1cdbd2cSJim Jagielski</meta> 34*b1cdbd2cSJim Jagielski<body> 35*b1cdbd2cSJim Jagielski<section id="relationen"> 36*b1cdbd2cSJim Jagielski<bookmark xml-lang="en-US" branch="hid/DBACCESS_HID_CTL_RELATIONTAB" id="bm_id3153345" localize="false"/> 37*b1cdbd2cSJim Jagielski<paragraph role="heading" id="hd_id3153323" xml-lang="en-US" level="1" l10n="U" oldref="1"><link href="text/shared/explorer/database/05020000.xhp" name="Relations">Relations</link></paragraph> 38*b1cdbd2cSJim Jagielski<bookmark xml-lang="en-US" branch="index" id="bm_id3146957"><bookmark_value>relational databases (Base)</bookmark_value> 39*b1cdbd2cSJim Jagielski</bookmark><comment>mw added "(Base)"</comment> 40*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3146957" xml-lang="en-US" l10n="U" oldref="2">This command opens the <emph>Relation Design </emph>window, which allows you to define relationships between various database tables.</paragraph> 41*b1cdbd2cSJim Jagielski</section> 42*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3154823" xml-lang="en-US" l10n="CHG" oldref="19"><ahelp hid="HID_CTL_RELATIONTAB">Here you can link together tables from the current database through common data fields.</ahelp> Click the <emph>New Relation</emph> icon to create the relationships, or simply drag-and-drop with the mouse.</paragraph> 43*b1cdbd2cSJim Jagielski<section id="howtoget"> 44*b1cdbd2cSJim Jagielski<embed href="text/shared/00/00000450.xhp#relationen"/> 45*b1cdbd2cSJim Jagielski</section> 46*b1cdbd2cSJim Jagielski<paragraph role="note" id="par_id3145316" xml-lang="en-US" l10n="U" oldref="3">This function is only available if you are working with a relational database.</paragraph> 47*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3149235" xml-lang="en-US" l10n="CHG" oldref="4">When you choose <emph>Tools - Relationships</emph>, a window opens in which all the existing relationships between the tables of the current database are shown. If no relationships have been defined, or if you want to relate other tables of the database to each other, then click the <emph>Add Tables</emph> icon. The <link href="text/shared/02/14020100.xhp" name="Add Tables">Add Tables</link> dialog opens in which you can select the tables that you want.</paragraph> 48*b1cdbd2cSJim Jagielski<embed href="text/shared/00/00000450.xhp#sytabelle"/> 49*b1cdbd2cSJim Jagielski<paragraph role="note" id="par_id3152812" xml-lang="en-US" l10n="U" oldref="17">If the <emph>Relation Design</emph> window is open, the selected tables cannot be modified, even in Table Design mode. This ensures that tables are not changed while the relations are being created.</paragraph> 50*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3150541" xml-lang="en-US" l10n="U" oldref="5">The selected tables are shown in the top area of the design view. You can close a table window through the context menu or with the Delete key.</paragraph> 51*b1cdbd2cSJim Jagielski<embed href="text/shared/explorer/database/02010100.xhp#darstellungaendern"/> 52*b1cdbd2cSJim Jagielski<bookmark xml-lang="en-US" branch="index" id="bm_id3148922"><bookmark_value>primary keys;inserting (Base)</bookmark_value> 53*b1cdbd2cSJim Jagielski<bookmark_value>keys;primary keys (Base)</bookmark_value> 54*b1cdbd2cSJim Jagielski<bookmark_value>external keys (Base)</bookmark_value> 55*b1cdbd2cSJim Jagielski</bookmark><comment>mw added "(Base)" to all entries</comment> 56*b1cdbd2cSJim Jagielski<paragraph role="heading" id="hd_id3148922" xml-lang="en-US" level="2" l10n="U" oldref="6">Primary key and other key</paragraph> 57*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3149168" xml-lang="en-US" l10n="U" oldref="7">If you want to define a relation among the different tables, you should enter a <link href="text/shared/00/00000005.xhp#primaerschluessel" name="primary key">primary key</link> that clearly identifies a data field of the existing table. You can refer to the primary key from other tables to access the data of this table. All data fields referring to this primary key will be identified as an external key.</paragraph> 58*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3147085" xml-lang="en-US" l10n="U" oldref="8">All data fields referring to a primary key will be identified in the table window by a small key symbol.</paragraph> 59*b1cdbd2cSJim Jagielski<paragraph role="heading" id="hd_id3153193" xml-lang="en-US" level="2" l10n="U" oldref="12">Define relations</paragraph> 60*b1cdbd2cSJim Jagielski<bookmark xml-lang="en-US" branch="index" id="bm_id3155430"><bookmark_value>relations; creating and deleting (Base)</bookmark_value> 61*b1cdbd2cSJim Jagielski</bookmark><comment>mw added "(Base)"</comment> 62*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3155430" xml-lang="en-US" l10n="U" oldref="13">All existing relations are shown in the relations windows by a line that connects the primary and other key fields. You can add a relation by using drag-and-drop to drop the field of one table onto the field of the other table. A relation is removed again by selecting it and pressing the Delete key.</paragraph> 63*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3149984" xml-lang="en-US" l10n="U" oldref="18">Alternatively, you can also click the <emph>New Relation</emph> icon in the top area of the relation field and define the relation between two tables in the <link href="text/shared/explorer/database/05020100.xhp" name="Relations"><emph>Relations</emph></link> dialog.</paragraph> 64*b1cdbd2cSJim Jagielski<embed href="text/shared/00/00000450.xhp#SyRelationen"/> 65*b1cdbd2cSJim Jagielski<paragraph role="warning" id="par_id3153093" xml-lang="en-US" l10n="U" oldref="14">If you use $[officename] as the front-end for a relational database, the creation and deletion of relationships is not placed in an intermediate memory by $[officename], but is forwarded directly to the external database.</paragraph> 66*b1cdbd2cSJim Jagielski<paragraph role="paragraph" id="par_id3155856" xml-lang="en-US" l10n="U" oldref="15">By double-clicking a connection line, you can assign certain properties to the relation. The <emph>Relations </emph>dialog opens.</paragraph> 67*b1cdbd2cSJim Jagielski</body> 68*b1cdbd2cSJim Jagielski</helpdocument> 69