Final answer:
During database design, an Entity-Relationship (ER) diagram and a database schema are developed together to provide both a conceptual and a detailed technical outline of the database's structure.
Step-by-step explanation:
During database design, an ER diagram (Entity-Relationship diagram) and database schema are usually developed in parallel. This process is analogous to how a team of architects may design a building, creating a visual representation of the building's layout alongside detailed specifications.
Similarly, in database design, the ER diagram provides a conceptual framework of how data is to be structured and related, while the database schema offers a more technical and detailed outline of the database structure, including tables, fields, and relationships.
As with the design process for physical objects, database design involves developing a detailed plan that specifies the structure and organization before moving on to the creation or implementation phase.During database design, an ER model and Relational model are usually developed in parallel.
The ER model represents the conceptual design of the database, focusing on the entities, attributes, and relationships among them. It helps to visualize the overall structure of the database.
The Relational model represents the logical design of the database, focusing on how the data will be stored and organized using tables, keys, and constraints. It helps to define the structure and operations of the database