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Re:Problems with Oracle SQL by chasil on Friday September 10, 2021 @07:17PM (#28487938)
The Oracle layer was also added to IBM DB2.

Which one? Good question. The mainframe, as/400, and Windows versions are all on separate source code last I heard.

https://www.enterprisedb.com/news/enterprisedb-and-ibmr-coll...

Re:Problems with Oracle SQL by metadata on Saturday September 11, 2021 @02:51PM (#28494708)
DB2 LUW (Linux/Unix/Windows), DB2 iSeries, and DB2 z/OS are three different databases. With the same name - I guess for branding.