It is a good choice to transfer software to database industry. Textual research is not the most important thing, but learning practical technology is the most important thing. You have passed many primary certifications, and you have no practical ability, which is equal to zero. It is suggested that learning technology well is fundamental. It seems you are a student. There is a WDP training program for students in Oracle Bone Inscriptions. You can attend. As long as the exam and training are 8500 yuan, you can also get OCP certificate, which is much stronger than your OCA certificate. I don't know which city you are from. I am in Tianjin. I only know that itaa is an authorization center and has a good reputation. You can ask about the specific situation.