Azure Cosmosdb

This one covers the essentials of working with Azure Cosmos DB's NoSQL API: partition key design, CRUD patterns with the TypeScript SDK, and consistency tradeoffs. The partition key guidance is solid, showing good patterns like userId or tenantId and warning against low cardinality or timestamp keys that create hot partitions. Includes practical code for point reads, cross-partition queries, pagination, and patch operations. If you're building on Cosmos DB and need to avoid the common mistakes around data distribution and query efficiency, this captures the patterns that actually matter in production. Focuses on the Core API, so if you're using MongoDB or Cassandra wire protocols, you'll need different resources.