Hello Kannan,

According to https://help.sap.com/viewer/bb5dd5b844d046ea97fa6b328e0fda1d/8.0/en-US/571119cc37ce465b93de726fc0408427.html

Installing SAP Identity Management and SAP NetWeaver AS Java on the same Oracle database server is not supported. You must install SAP Identity Management and SAP NetWeaver AS Java on different Oracle database servers.

So, the answer is no, IdM and NW DB schema can not be installed on one and the same DB server even for non-productive landscape.

Hope this clarifies your query.

Kind Regards,

Mary,
SAP Product Support