YOU (Yast Online Update) is the package updater for suse. Yum is redhat's.
YOU updates a system based on the closest mirror. yast2, the suse system tool, can do these tasks you said, from emerge. You can launch yast2 from cli or gui, as you wish.
Also, the people from apt4rpm have this http://linux01.gwdg.de/apt4rpm/
resource, a apt-get system for suse, which can do great things.