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PostgreSQL for Data Architects by Jayadevan Maymala

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Database design tools

Let's see why we need a database design tool.

Although the number of tables in your database will definitely depend on the type of product you are working on, it's highly unlikely that there will be a system doing serious work with less than 10-20 tables. By the time we add tables to manage users, roles, and privileges, we will have 4-5 tables. Add a few tables to audit user actions and we will have double digits. Then, of course, there will be tables to support the core business.

We might have a system that deals with products, customers, and warehouses. Or, we can design a system that deals with flights, routes, inventory, and fare classes. Also, we can build a Facebook-killer system with friends, connections, blog posts ...

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