This page shows a list of our Industry-specific Data Models in 50 categories that cover Subject Areas and are used to create Enterprise Data Models. An example of a one-to-one relationship would be a database tracking people and passports. First, take a look at a description of the system: A car rental company rents cars to customers. Click here for our new Courses on Database Design and Data Modelling. A database design that can change easily according to the needs of the company is crucial because it ensures the final database system is complete and up-to-date. A database contained within a data warehouse is specifically designed for OLAP (online analytical processing). The Database Library System is intended to Automate the library activities such as creating a new borrower, giving books to the borrowers, maintaining the details of all the item that were available in the books . Do design for performance, this is critical in database design and is NOT premature optimization. If database design is done right, then the development, deployment and subsequent performance in production will give little trouble. There are a small number of mistakes in database design that causes subsequent misery to developers, managewrs, and DBAs alike. Let's imagine we have a database tracking authors and books. Here is an alphabetical list all of our 1,800+ Data Models. Most data modeling software allows you to create and define individual data domains. All the way through your design consider data integrity. A well-designed database 'just works'. Each car has a brand , model name , production year , mileage , color, and so on. Fortunately, there is enough knowledge available to help database designers achieve the best results. The company owns several cars. For example, if the database records people’s ages, ensure whole integers of 3 digits max. Data that has no integrity is meaningless and useless. The third option is known as a many-to-many relationship. Database do not refactor easily, so it is important to get the most critical parts of the performance equation right the first time. For example, if you wanted to analyze all the data from various planets and continents this data management process is best suited for a data warehouse environment. Database design is a combination of knowledge and experience; the software industry has evolved a lot since its early days. Here are the ten worst mistakes Each person can only have one passport, and vice versa, so those two tables would have a one-to-one relationship. Examples include: Describe design decisions on database distribution (such as client/server), master database file updates and maintenance, including maintaining consistency, establishing/ reestablishing and maintaining synchronization, enforcing integrity and business rules. 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