배우기를 멈추는 사람은 20세건 80세건 늙은 것이다.

UPDATE table_users
    SET cod_user = (case when user_role = 'student' then '622057'
                         when user_role = 'assistant' then '2913659'
                         when user_role = 'admin' then '6160230'
                    end),
        date = '12082014'
    WHERE user_role in ('student', 'assistant', 'admin') AND
          cod_office = '17389551';

https://stackoverflow.com/questions/25674737/mysql-update-multiple-rows-with-different-values-in-one-query/25674827