There is no 'upgrade exam' for OCA certifications. However, there doesn't need to be. If you are an Oracle Database 11g Administrator Certified Associate, then you have already passed a SQL exam. The only test you need to take to become an Oracle Database 12c Administrator Certified Associate is 1Z0-062. That test is in beta until the 16th of November and should be in production early next year.
The only reason for the 1Z0-060 upgrade exam is that it allows 11g OCPs to upgrade with a single exam rather than two exams.