Build something, it's easier to talk about something you built. Share the victory and pain points of building that thing.
Databases background, IT background, Proactive learning attitude, Good communication skills, Ask questions,
Make sure you do your research on the company and understand what kind of work they do. Review and improve your CV and bring your real self.
Be friendly, open and honest. Go over the general interview questions you may expect to answer. Be willing to be communicative.