The adoption of cloud-based services has been on the rise in recent years. In this study, a comparative study of three major cloud database platforms, namely Microsoft Azure, IBM DB2, and Oracle Cloud, was conducted to analyze their features, performance, and suitability for different use cases. This chapter explores the architectures of these platforms, examines their database management tools, and evaluates their support for scalability, security, and data integration. In the experiment section, Oracle performed the best with an average execution time of 3.35ms, which was the fastest of the three databases. In the survey section, the results show that MS Azure is the most available, secure, cost effective, and efficient. Oracle can be seen from the survey responses as the most reliable and also most cost effective. This chapter gives insightful information to organizations and people who want to pick the finest cloud database platform for their requirements.