How to install and configure oracle 7 in my Windows Vista ???

I want to install oracle 7 in my windows vista PC. But while configuring SQL net easy configuration for connecting the database from server its showing some error. Can anyone help here ???

How to equijoin the works in orcale in real time project ???

I have taken two composite tables ....through this how can i equijoin the work in real time project in Orcale......plz explain with some example