Anew generation of low-cost, high-performance database software is rapidly emerging to challenge SQL's dominance in distributed processing and Big Data applications. Some companies have already traded SQL's rich functionality for these new options that let them create, work with, and manage large data sets. A big reason for this movement, dubbed NoSQL, is that different implementations of Web, enterprise, and cloud computing applications have different requirements of their databases. Not every app requires rigid data consistency, for example.
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