Relational theory informs relational database design from "summary" of SQL and Relational Theory by C. Date
Relational theory, which underpins the relational model of data, is a powerful tool that can guide the process of designing a relational database. The principles of relational theory provide a clear and logical framework for organizing data in a way that is both efficient and effective. By understanding the fundamental concepts of relational theory, designers can make informed decisions about how to structure their databases to best meet the needs of their users. One key concept of relational theory is the idea of data independence. This principle states that the structure of a database should be separate from the applications that use it. This means that changes to the database structure should not require changes to the applications that access the data. By adhering to this principle, designers can create databases that are flexible and easy to maintain over time. ...
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