This page is for anyone using an ERD to define data structures. It explains the properties for relationships.
Overview
Relationships are part of ERDs; see Understanding ERDs and Drawing ERDs. They represent the connection between a primary key attribute in one table and an attribute in another table. For example, the relationship line in the screenshot below shows that the Teacher table includes an attribute called Department, and this contains the ame data as the SchoolDept table's unique identier (UID).
A tables unique identifier is its primary key, and where it occurs in another table, it is a foreign key.
To open relationship properties, in an ERD click on the relationship line. Relationships are not listed in the repository.
Most of the properties of a relationship are automatically set by the ERD, so are read-only. You can add details to the description.
Properties
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Basic Settings
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| Description | Editable |
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| Table A | Read-only | The name of the source table for the relationship. | ||||||||
| Table Attribute A | The source attribute. | |||||||||
| Table B | The name of the destination table for the relationship. | |||||||||
| Table Attribute B | The destination attribute. |
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