Entity-Relationship A database or information system's structure can be modelled and described using a diagram. It aids in comprehending how data is arranged and the connections between various system elements. In order to plan and record database structures, ERDs are frequently used in database design and development. Entities The essential building elements of a database system's representation of actual things, ideas, or entities are known as entities in the context of database design. These things, which are frequently nouns, act as data storage and organisation units. A company database may contain the following entities: "Customer," "Product," "Employee," and "Order." Attributes The qualities or traits attached to entities are known as attributes, and they specify the types of data that may be stored by each object. An entity's attributes are used to specify the specific information that relates to it. For example, the "C...
