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Introduction to NoSQL • Martin Fowler • GOTO 2012
GOTO Conferences

Martin Fowler's GOTO 2012 introduction to NoSQL databases: where they came from, their data models, how consistency thinking differs, and when to use them. He argues they won't make relational databases obsolete and introduces polyglot persistence.
HN repeatedly recommends it as a balanced, beginner-friendly overview of SQL versus NoSQL, and some teachers assign it to students.
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