38+ Design Primary Key Symbol In Er Diagram Example Download Zip PNG. Owning an successful design provides assistance to the database designers to discover the movement of web data and functioning of your total system. For example for a student entity set roll number or registration number can be in the previous er diagram roll number is chosen as the primary key.
For example for a student entity set roll number or registration number can be in the previous er diagram roll number is chosen as the primary key.
You can simple mention as of primary key and write or make a note that attribute as foriegn key in the diagram. Get er diagram examples here! Er diagram symbols and notations. Any object, for example, entities, attributes of an entity, relationship sets, and attributes of relationship sets, can be represented with the help of an er diagram.