in a shared appl top env whenever we apply the patch in one node we have to run autoconfig on all other nodes where the application tier components are existing .Yes.
is this statement correct
so should we run the autoconfig only at the applications level? no need to run the autoconfig on the database level in database tier?Just on the application tier nodes (you can still run it on the database tier node but this is optional). If you are instructed to run it on the database tier node by the patch README file, then you will have to do.