This paper aims to help you choose the right database for your needs. With hundreds of choices — including very specialized products and others that can serve a wider variety of needs — it’s very important to understand their features, benefits, and tradeoffs. This paper outlines the changing demands placed on databases, as the types and uses of data evolve. It includes a brief overview of databases, from the 1960s to the present, and describes the factors that challenge the validity, consistency, and scalability of database transactions, as well as how to address them. Finally, we explore the features and benefits of managed database products in Google Cloud Platform.