Why NoSQL Exists and What Problems It Solves

This lesson explains why NoSQL databases emerged, what pressures exposed the limits of traditional relational designs, and how systems such as MongoDB, Redis, and DynamoDB solve different classes of application problems.

Learners will distinguish NoSQL as a set of design tradeoffs rather than a single technology, connect common NoSQL models to real workloads, and understand when a relational database is still the better choice.