MongoDB
Document storage with a flexible schema.
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This course has 3 lessons. Start with the first one and use the next / previous links at the bottom of each lesson — the sidebar keeps the whole course in order.
Lessons
- Documents, collections and queriesThe document model, dot notation into nested data, and the query and update operators you will use every day.
- The aggregation pipelineStages as a sequence of transformations, the accumulators worth knowing, and how to keep a pipeline eligible for indexes.
- Indexes and schema design patternsCompound index ordering with ESR, the index types MongoDB offers, and the patterns that keep documents bounded as data grows.
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Last refreshed 2026-09-17.