I would maybe consider something a little more broad. There are no guarantees that the place you want to work uses Oracle, and so far as I’ve seen that normally isn’t included in the job description. I would start with basic SQL classes. What kind of career are you hoping to change in to? This would help determine next steps after the basic classes. More on reddit.com

I did this. I was sql dba first. The learned oracle. Holy moses i had to undocinate myself from microsoft to really get Oracle.

But once it clicked it got better. I passed the OCA but then got laid off.

So now its a resume item

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I interview a lot of SQL candidates, and no, there are none in particular. I just look for someone who has taken the time to educate themselves, regardless if it's more of an old-school type cert, or something more modern like passing a Coursera track in SQL. Of course, the candidate needs to be able to speak SQL at a proficiency which befits their experience. Candidates straight out of college who have a relevant degree, have taken a SQL course once or twice, but don't remember much of it and haven't bothered to do anything on the side to enhance their skills don't make it very far in the interview process. TL;DR I don't focus on a specific cert. More on reddit.com

I think having a competent understanding of SQL is more important than having any particular certification. The argument could be made that there are plenty of free courses and certifications out there that would do the trick and paying for one is silly. But it's up to whatever your learning style is. That being said, Front Range Community College (based out of Colorado, but it's a remote class) offers a paid ($230), instructor led, two part course that I really liked. There are two classes a week and there's a forum where you can talk about the coursework with other people. After I completed that class, I felt very confident with creating and working within databases. It also gave enough of an understanding that I was able to hold my own in the interview for my future job as a DE. It should be said I supplemented the course with a lot of projects and leetcode More on reddit.com