Best practices for oracle to PostgreSQL migration

As enterprises increasingly shift toward open-source technologies to reduce cost, increase flexibility, and modernize their technology stacks, the migration from Oracle to PostgreSQL has become a strategic imperative. This review examined best practices for Oracle-to-PostgreSQL migration by synthesizing insights from academic research, industry case studies, and tooling evaluations. It discussed architectural differences, schema and code translation strategies, data migration tools, and performance optimization techniques. Findings suggest that while PostgreSQL offers long-term cost and scalability benefits, successful migration requires detailed planning, technical readiness, and iterative testing. The paper also introduced a theoretical model and practical pipeline to guide enterprises through the migration lifecycle. Future directions include AI-assisted migration automation, hybrid multi-database orchestration, and sustainability-focused performance tuning.