Database Trends and applications have names have listed the best relational database and best big data platform.
Best relational database: SQL Server
"According to Craig S. Mullins, president & principal consultant, Mullins Consulting, Inc, relational continues to dominate: IDC forecasts that relational DBs will still account for more than 80% of the total operational database market through 2022, and Gartner forecasts that through 2020, relational technology will continue to be used for at least 70% of new applications and projects."
Best big data platform: Cloudera Enterprise Data Cloud
"To leverage the immense power of their data, organizations need a solid strategy that incorporates everything from security to data governance to the right big data technologies. Enabling both on-prem and cloud deployments—or a hybrid strategy—big data platforms today support data warehouses, data lakes, data science, engineering, machine learning, myriad database management systems, and much more. And while Hadoop is a key element of big data platforms today, there are also many other open source components, support capabilities, and advanced features that round out a big data platform to give data-driven companies the big data capabilities they need"