How to Connect to an Oracle Database Using Python and OJDBC?

To connect to an Oracle database using Python and the OJDBC driver, you need to follow these steps:

1. Install the required libraries:
   • Install Python if you haven’t already. You can download it from the official Python website: https://www.python.org/downloads/
   • Install the cx_Oracle library, which is a Python extension module that enables access to Oracle Database. You can install it using pip by running the following command.
2. Download the Oracle JDBC driver (OJDBC):
   • Visit the Oracle website and download the appropriate version of the Oracle JDBC driver (OJDBC) for your Oracle database version. Make sure to download the .jar file.
   • Place the downloaded .jar file in a directory of your choice.
3. Set up the Oracle environment variables:
   • Set the ORACLE_HOME environment variable to the directory where Oracle client is installed.
   • Add the Oracle client library directory to the LD_LIBRARY_PATH environment variable.
   • Replace /opt/oracle/instantclient_19_11 with the actual path to your Oracle client installation directory.
4. Connect to the Oracle database using Python:
   • Import the cx_Oracle module in your Python script.
   • Establish a connection to the Oracle database using the cx_Oracle.connect() method.Replace "username", "password", "hostname", "port", and "service_name" with the appropriate values for your Oracle database.
   • Create a cursor object to execute SQL statements.
   • Execute SQL queries using the cursor.
   • Close the cursor and the database connection when finished.

That’s it! You have successfully connected to an Oracle database using Python and the OJDBC driver. Remember to handle exceptions and errors appropriately in your code.