In the conceptual model you use the table editor to edit e.g. the attributes of an entity.
In the table editor, contents of an element are edited, e.g. attributes of an entity.
For each type of content element there is a tab in which the elements of this type are shown as rows in a table.
The columns of the table correspond to the properties of the element. The order corresponds to that in the Properties area in the Properties tool window and cannot be modified. Right-clicking on the column head opens a drop-down list where you can select the displayed properties.
A table editor can be opened for the following elements of the entity relationship model:
Special features in the table editor for elements of the entity relationship model:
In order to exist, a 'Feature in the unique key' requires an attribute in the entity which is not yet in the key.
During creation, a dialog is opened in which one or more attributes can be selected to be added to the key.
A 'Feature in the relationship key' can only be created if there are fewer attributes in the foreign key than in the unique key referenced.
In this instance, a dialog opens on creation in which you can select the referenced attribute. At the same time, a new attribute is then created in the entity for the foreign key.
If you want to use an existing attribute in the foreign key, you can only assign this in the diagram editor by adding it to the foreign key using drag-and-drop.
© 1986-2014 MID GmbH Nuremberg Germany. DIN EN 9001 certified. All rights reserved.