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MongoDB Tutorial

Documents, collections, CRUD, aggregation, Atlas and driver connectivity.

SQL vs NoSQL

SQL databases are table-based with a fixed schema and strong consistency; NoSQL databases (like MongoDB) trade some of that rigidity for flexibility and horizontal scale.

  • SQL — tables, fixed schema, ACID, vertical scaling, strong for complex relationships
  • NoSQL — documents/key-value/graph/columnar, flexible schema, horizontal scaling
  • Neither is universally 'better' — pick based on your data shape and access patterns