Oracle与ODBC连接常见错误及解决方案

Error: “ORA-12541: TNS:no listener”
Solution: This error indicates that the Oracle listener service is not running or is not configured properly. Make sure the Oracle listener service is running on the server and listening on the correct port. Check the listener.ora file for correct configuration settings.

Error: “ORA-01017: invalid username/passWord; loGon denied”
Solution: This error occurs when the username or password provided in the ODBC connection is incorrect. Double-check the username and password entered in the ODBC connection settings. Ensure that the user account exists in the Oracle database and has the necessary privileges.

Error: “ORA-12520: TNS:listener could not find available handler for requested type of server”
Solution: This error indicates that the Oracle listener is unable to find a suitable connection handler for the requested type of server. Increase the number of processes or sessions in the Oracle database configuration to allow for more connections. Check the listener.ora file for any restrictions on connection handlers.

Error: “ODBC driver for Oracle is not installed”
Solution: If you encounter this error, it means that the ODBC driver for Oracle is not installed on the system. Download and install the appropriate Oracle ODBC driver for your system from the Oracle WEBsite. Configure the ODBC data source using the installed driver to establish a connection to the Oracle database.