The DB Access Module for Oracle OCI does not require any specific client setting to insert or read data if your database is set up correctly to use UTF-16 encoding. However, you are advised to set the appropriate NLS_LANG in your operating system environment or Windows registry to customize the behavior of the Oracle OCI client. For customized error messages, you must set the correct locale in your environment along with NLS_LANG. NLS_LANG should be set before executing the application.