How to data migrate from SAP to EPRNext

Currently, I am using SAP and I have customized ERPNext as per my requirement. Now its time to migrate data from SAP to ERPNext. SAP has 76+K tables with non-readable (Some random text ) table name and field name. Anybody has any idea how to migrate data from SAP?

If you know the functional mapping between the fields of SAP to ERPNext, you can try to use Data Migration Tool for creating a mapping. Alternatively, you can use Data Import Tool as well.