I have a problem with create pernament (301) redirect in apache:

I have 2 domains:
olddomain.com with many subdomains
newdomain.com

and I want to do redirect like:

if user enter on http://anysubdomain.olddomain.com should be redirected to http://anysubdomain.newdomain.com

if user enter on http://olddomain.com/something should be redirected to http://newdomain.com/something

if user enter on http://olddomain.com/different/index.html should be redirected to http://newdomain.com/different/index.html

if user enter on http://example.olddomain.com/ex/index.html should be redirected to http://example.newdomain.com/ex/index.html

I don't know how I should set this:

<VirtualHost *:80>
  ServerName olddomain.com
</VirtualHost>

Regards