PostgreSQL, Pl Sql, Query Optimization, Oracle, Google Cloud Platform, schema normalization, pg stat statements, AlloyDB, row-level security, Agile practices, data integrity strategies, EXPLAIN ANALYZE, Connection Management, vacuum tuning, Git-based version control, fault-tolerance, infrastructure-as-code, CI CD workflows, WAL configuration, PL pgSQL, Disaster Recovery, Indexing, HA replication, partitioning