U of California Undergrad Business

How do U of California’s undergrad business programs work? I’ve found scarce information on them except for Berkeley so I’m a bit confused. Other than Berkeley, looking at Irvine, Santa Barbara and San Diego.

There are only 3 UC’s that actually have a business school: UCI/UCB and UCR. The rest of the UC’s have business related majors such as Econ/Managerial Econ etc… So what is your question?