Cover Page by Pramod J. Sadalage, Martin Fowler

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Chapter 12. Schema Migrations

12.1. Schema Changes

The recent trend in discussing NoSQL databases is to highlight their schemaless nature—it is a popular feature that allows developers to concentrate on the domain design without worrying about schema changes. It’s especially true with the rise of agile methods [Agile Methods] where responding to changing requirements is important.

Discussions, iterations, and feedback loops involving domain experts and product owners are important to derive the right understanding of the data; these discussions must not be hampered by a database’s schema complexity. With NoSQL data stores, changes to the schema can be made with the least amount of friction, improving developer productivity (“The Emergence of ...

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