JSON Relational Duality, an innovation introduced in Oracle Database 23c, unifies the relational and document data models to provide the best of both worlds. Developers can build applications in either relational or JSON paradigms with a single source of truth and benefit from the strengths of both models. Data is held once but can be accessed, written, and modified with either approach. Developers benefit from ACID-compliant transactions and concurrency controls, which means they no longer have to make trade-offs between complex object-relational mappings or data inconsistency issues.