Chapter 2. Data Models
The flexibility of any database depends on the architecture and design of its data models. A data model fundamentally decides how data is stored, organized, and can be manipulated. When it comes to typical a RDBMS, we tend to provide the information in terms of hierarchical, relational, and network data models. SQL was designed to interact with an end user assuming he/she will use SQL to run queries that would aggregate data at one place, giving all information together. But it takes a lot of effort to maintain this user-oriented approach. Later, people realized that most of the time is being spent on creating database schemas, maintaining referential integrity, and providing transactional guarantees even though they are ...
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