In SAS, a maintenance release is similar to a Release in Windows. It is basically the same SAS 9.4 major version, but including all the hotfixes available for the previous release/maintenance and most probably also some new minor versions/features. In SAS a maintenance release can be identified by opening SAS Foundation and watching the top of the initial log, marked as SAS 9.4 MX, i.e, SAS 9.4 M5, for the 5th maintenance of SAS 9.4
Yes, in the SAS 9.4 you can easily upgrade to maintenances on the same SAS major version. But not between major versions. Meaning:
- You can upgrade from SAS 9.4 M1 to SAS 9.4 M2, M3, M4 or M5, no problems.
- You cannot upgrade from SAS 9.3 or SAS 9.2 to SAS 9.4
- You cannot upgrade from SAS 9.3, SAS 9.4 to SAS Viya.
For the cases I mentioned you cannot upgrade, you will be always able to migrate. I hope it is clearer now.
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