What Is a Multi-Model Database and Why It Matters

If you work on modern applications long enough, you will eventually run into the term "multi-model database". At first, it sounds simple. A database that supports more than one data model. That is true, but it is still too vague to be useful. A multi-model database is a database that lets you work with different kinds of data in one system instead of forcing you to split them across several databases from the start. That usually means some combination of: Relational data Document data Key-value