True ETL Tools
If you need more than just to copy data from Zoho Billing to Oracle, you may use Skyvia's powerful ETL functionality for Zoho Billing and Oracle integration. Skyvia's Import tool will correctly extract Zoho Billing data, transform it, and load to Oracle when Oracle tables have different structure than Zoho Billing objects. Moreover, Skyvia Import allows loading data in any direction, supporting Reverse ETL scenario.
For more complex cases, you can use Data Flow and Control Flow tools. They are designer-based solutions for creating complex data pipelines, involving not only Zoho Billing and Oracle connectors, but any number of connectors in one integration. With these tools you can automate data workflows, involving custom logic, complex multistage transformations, combine data from different sources, load them into multiple destinations at once and many more.