How many JavaScript frameworks vs. how many databases do You know? It is most crucial and complicated part of the system. It also has the biggest effect in terms of modeling and performance. Most often we pick based on our preferences, or what seems hip at the moment. And there is a lot to choose from: relational, graph, document, key-value, search, stream, embedded to name the most common types. And the best part is, we don’t have to choose one! This talk will cover types of databases, their weaknesses, main players, strong points when to use them, and when it might not be the best idea and lastly how to combine them.