Database Administration and Data Management Questions

Operational responsibilities and best practices for maintaining data stores and data integrity. Topics include administration of relational databases such as PostgreSQL MySQL and Oracle as well as non relational databases when appropriate, schema design and normalization tradeoffs, indexing and query optimization strategies, backup verification and restore procedures, replication and high availability topologies including leader follower and multi master approaches, sharding and horizontal partitioning for scale, capacity planning and storage optimization, transactional consistency and isolation considerations, and security and compliance controls such as encryption auditing and retention policies.