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This skill provides a unified workflow for architecting and maintaining both relational (PostgreSQL) and document-oriented (MongoDB) database systems. It guides developers through the entire database lifecycle, from initial schema design and data modeling to writing complex aggregation pipelines and SQL joins. Beyond basic CRUD operations, it assists with high-level administrative tasks such as implementing migrations, configuring replication and sharding, managing user permissions, and diagnosing performance bottlenecks using advanced profiling tools. Whether you are building a transactional financial system or a flexible IoT data lake, this skill ensures best practices are followed for data integrity and scalability.
