If this is strictly a BAS/Foundation installation, it's basically a installation issue. How to install/upgrade are covered by several documents in Install Center area in support.sas.com.
SAS 9.2 is backward compatible, so nothing to worry about there.
DI Studio: is this environment separated from the environment you plan to upgrade, if so, see above. If not: metadata server is not forward compatible with 9.2, at least, SAS is not supporting such a configuration (running 9.1.3 metadata server on a 9.2 Foundation). For this environment, you will have to wait to phase 2 in 9.2 roll-out.
Regards,
Linus
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