Detailed Review Of Preparation

Prepare the exam by focus on exam guide. If you start from the begining (no prio DB experience, start with https://d1.awsstatic.com/training-and-certification/ramp-up-guides/RampUp_Databases_2182020.pdf Read through the recommendation.)

In the exam guide, focus on DB migration, RDS + dynamo, encryption and audit. Understand different databases use cases. Search for DB design pattern or advanced topics in reinvent videos, lvl 300-400 are usually very good.