An Entity-Relationship (ER) Diagram is a visual representation of the relationships between entities within a system. In this case, the system is a car booking system. The ER diagram can help to represent the various entities that make up the system, like customer information, vehicle information, and bookings, as well as the different relationships between them, such as customers making bookings for vehicles and vehicles having related customer booking information. An ER diagram allows us to better visualize how these entities are interconnected and can be used to easily identify any problems or inconsistencies with our car booking system. EdrawMax is the best diagramming tool that helps in creating different diagrams, as mentioned here. With EdrawMax, you can create flowcharts, swimlane, network diagrams, and 280 other diagrams.
