SAP's cloud offerings are currently built on Oracle.
Not for long.
https://www.sdxcentral.com/articles/news/sap-targets-oracle-cuts-as-part-of-cloud-focused-strategic-review/2019/04/
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Since they own Sybase.
No reason not to leverage that.
No doubt moving it off in-house Oracle infrastructure and software to AWS or Azure. Probably Azure given their partnerships.