| Oracle DB Version | Works with Client 11.2.0.4? | Notes | |------------------|-----------------------------|-------| | 11.2.x | ✅ Full | Ideal match | | 12.1.0.x | ✅ Yes | Supported (but 12c client recommended) | | 12.2.0.x | ⚠️ Limited | May work, but some features fail (e.g., multitenant, longer identifiers) | | 18c / 19c / 21c | ❌ Not supported | Will fail with ORA-28040 or ORA-03134 |