This Bank Application ER Diagram is also referred to as an Entity-Relationship diagram. It is used to examine the database's structure. It depicts the connections between entities and their attributes. An ER model facilitates communication. Depending on your needs, you can create an ER Model to assist you in focusing on the links and relations between specific entities and their attributes. This lets you identify errors and flaws in the design before its practical application. An example of an ERD created for an online banking system is shown below. You can view various entities such as a user, account, transaction, payment, and staff. The entities' attributes are also mentioned, and clear relationships have been drawn.