此指令會開啟 [關係設計] 視窗，在此您可以定義各種資料庫表格之間的關係。
在此您可以透過共用資料欄位將目前資料庫的表格連結在一起。按一下 [新增關係] 圖示，或者拖放滑鼠以建立關係。
When you choose Tools - Relationships, 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 on the Add Tables icon. The Add Tables dialog opens in which you can select the tables with which to create a relation.
如果 [關係設計] 視窗開啟，即使在表格設計模式下也無法修改選取的表格。如此可確保建立關係時，表格不會變更。
The selected tables are shown in the top area of the relation design view. You can close a table window through the context menu or with the Delete key.
If you want to define a relation among the various tables, you should enter a primary key that uniquely identifies a data field of an 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 a foreign key.
All existing relations are shown in the relations windows by a line that connects the primary and foreign 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.
If you use LibreOffice as the front-end for a relational database, the creation and deletion of relationships is not placed in an intermediate memory by LibreOffice, but is forwarded directly to the database.