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Hello, look at the documentation of Dataguard Concepts and Admininstration http://docs.oracle.com/cd/B19306_01/server.102/b14239/upgrades.htm#SBYDB1200. There's a chapter "B Upgrading Databases in a Data Guard Configuration"
Thanks Sir for your reply ,
I'll check it before stating in upgrade process , but i need the sequential of the whole upgrade process (RAC ,DG , DB)
if you follow the second link I posted, all the necesary steps are there, even if you have RAC, there procedure is explained there. Have a look at chapter "B.2 Upgrading Oracle Database with a Physical Standby Database In Place" it, and if you still have questions post them here.