: Optional; provides header files for developing your own Oracle applications. 2. Full Oracle Database Client
| Mistake | Solution | | :--- | :--- | | Downloading the full "Oracle Database" (20GB+) instead of the client | You only need the , which is ~700MB. | | Using a 32-bit client with a 64-bit application | Match the bitness. If your app is 64-bit, download the 64-bit client. | | Downloading from third-party sites | Only download from oracle.com or edelivery.oracle.com to avoid malware. | | Forgetting to unzip both parts | If you only unzip Part 1, the installer will fail. Extract both files together. | oracle db client download
: Mandatory; includes all files needed for OCI, OCCI, and JDBC-OCI applications. : Optional; provides header files for developing your