Install Oracle Client 12c Jun 2026

For detailed troubleshooting, it is recommended to review official documentation on Oracle Help Center.

cursor = conn.cursor() try: yield cursor conn.commit() except Exception as e: conn.rollback() logger.error(f"Transaction rolled back: e") raise finally: cursor.close() self.return_connection(conn)

Navigate to the official Oracle Software Delivery Cloud or the Oracle Database Downloads page.

If you run into any road blocks during your configuration, let me know: What (and version) you are installing on? Whether you are using the 32-bit or 64-bit client? The exact error message or code you are seeing? install oracle client 12c

Open Command Prompt and run SQL*Plus to test connectivity: sqlplus username/password@tnsnames_alias Special Considerations for ODAC (32-bit/64-bit)

# Check if connection is still valid if self._validate_connection(conn): self._pool.put(conn) else: logger.warning("Invalid connection returned, closing") self._close_connection(conn) # Create replacement connection new_conn = self._create_connection() if new_conn: self._pool.put(new_conn)

unzip linuxx64_12201_client.zip -d /home/oracle/client_install For detailed troubleshooting, it is recommended to review

set -e

After installation, you need to configure Oracle Client 12c to connect to your Oracle database. Follow these steps:

@dataclass class ConnectionStats: """Connection statistics""" total_created: int = 0 total_destroyed: int = 0 active_connections: int = 0 failed_connections: int = 0 last_error: Optional[str] = None avg_connection_time: float = 0.0 Whether you are using the 32-bit or 64-bit client

Fix: The client is reaching the host server, but the database listener is down. Contact your database administrator to start the listener on the server.

The installation will proceed, and you can monitor the logs located in the inventory directory ( /opt/oraInventory/logs ). A successful silent installation will return a message like: The installation of Oracle Client 12c was successful.

For Oracle Database 12c Release 2 (12.2), many of these same operating systems are supported, including Windows 10 and Windows Server 2016, Red Hat Enterprise Linux 7, and Oracle Linux 7.

Oracle offers two primary types of clients for 12c: