After studying, you can take the class as the unit, because teachers will be sent from Oracle Bone Inscriptions Company to supervise.
A class can do without registering for the exam, but there must be more than 15 students before the teacher comes. After all, there are teachers there.
You can't come here just because one student and two students have an exam. After the exam, the authentication of the database comes from oracle.
The company mailed it to you, and it will arrive in about 3 months, but you must take OCA first to take OCP.
That is to say, it will take about three months at the earliest from your study to your certification. Please check your time first.
No? Now there is a database of WDT activities in Yahweh, Beijing. You can ask online.