1. Use a metadevice (/dev/md..) created on top of your disks(cXtXdX) with Solaris SVM in your database setup as raw volume.
2. Application (in this case database) will reference a raid 5 protected raw metadevice as any other raw disk present in system.
Be sure to read about limitations and cavecats :
Creating RAID-5 Volumes - Solaris Volume Manager Administration Guide
As for RAID-5, i would not recommend it unless for very small databases and/or read intensive database.
Otherwise (large writes, OLTP) use mirror (RAID-1 with SVM) instead for much better performance.
Hope that helps
Regards
Peasant.