Postgres
Postgres is the most advanced open source database. Rock solid performance, tons of features, and robust support for everything you need out of a database.
π Project of the day: Postgres π
Postgres (code) is the world's most advances Open Source database. This project probably isn't new to you, but if it is today is your lucky day!
If you're not familiar, then peruse the excellent documentation and be amazed at how robust and powerful it is.
Postgres makes storing data a breeze, runs in containers and outside containers, and has one of the most vibrant ecosystems in the F/OSS world.
If you need to store data and want a rock solid, reliable database to store and execute queries at web-scale, check out Postgres.