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It is designed for developers, students, and small organizations who want to learn Oracle or deploy small-scale applications without the financial burden of enterprise licensing.

| Feature | Oracle Database Free | PostgreSQL | SQLite | | :--- | :--- | :--- | :--- | | Max Data Size | 12 GB | Unlimited | 281 TB | | Max RAM Usage | 2 GB | Unlimited | Configurable | | Concurrency | Full (but limited by RAM) | Full | Limited (write locks) | | Procedural Language | PL/SQL (proprietary) | PL/pgSQL (open) | Tcl, Python, etc. | | Production Use | Allowed (with limits) | Allowed (full) | Allowed (full) | | Upgrade Path | Paid Oracle editions | Free (same product) | Free (same product) | oracle database free