📄️ PostgreSQL
PostgreSQL — advanced features, JSONB, extensions, performance tuning, and .NET integration
📄️ MS SQL Server
Microsoft SQL Server — T-SQL, execution plans, indexing strategies, and performance optimization
📄️ MongoDB
MongoDB — document model, aggregation pipeline, indexing strategies, and schema design patterns
📄️ Redis
Redis — data structures, caching patterns, pub/sub, and distributed locking strategies
📄️ Elasticsearch
Elasticsearch — indexing, full-text search queries, mapping, cluster management, and .NET clients