I am an Oracle PL/SQL Developer Certified Associate. The main reason I got certified was that my company said they wanted people to get certified, and they were willing to pay. So I think I bought some training materials. Went in for an in person class. Then took and passed the test.
The certifications desired for my dream job were ones I had not heard of before. Maybe they are new. I really don't pay too much attention to certifications any more. I think it is time for that to change. So I have been studying the OCA Oracle Database SQL Certified Expert Exam Guide. Got an online copy. I am encouraged that I get most of the answers right at the end of each chapter.
There were a lot of basics that I did not have a strong grasp on. For instance I knew object names were capped at 30 characters. I found that limit the hard way. However I did not know objects need to start with a letter. Also did not know the only special characters allowed in the name are $, _, and #.
Speaking of names, there are objects that are grouped together in namespaces. That is, certain objects cannot have the same name in the same namespace. Here are those namespaces:
- user, role, public synonym
- table, view, sequence, private synonym