Today I finally tuned my Solaris 11 express so now works better 
I want to install some relational database on that machine and learn for
my future carrier.
I downloaded Oracle database 10g for Solaris x86 and tried to install it but my system didn't passed system requirements, installer says to install database system must be 5.10 or Solaris 10 and I have 5.11.
So is possible to install Oracle database 10g on Solaris 11 Express ?