Do I need a just cause to give notice to tenant?

[Simon Stahl]

I am looking around to buy a property in or around Oakland, CA and was wondering if it is worth looking at the ones that are tenant occupied. I know Oakland is very renter friendly and you need a just cause to evict someone. I am a bit unsure though if eviction is the same as giving notice. 

If I buy a property that is tenant occupied, can I give notice to him/her without just cause? I would want to rehab the property and then either sell it or rent for a market prize. 

One more question: does it make a difference if the tenant is section 8 or not?

Thanks