Lol What?

It's good. I mean it. You do not have SQL like rigid tables holding your data, foreign keys to map relation. It's not plain key-value pairs like Mongodb, either. Instead, you have this:

The connecting line is the "Relation" between two objects (or Node), which is a foreign-key in sql, or reference in Mongodb. But the difference is, you define the relation just as is:

CREATE (you:Person)-[relation:LEARNING]->(js:Language)

Any Superpowers?

Yes. It's relational, but at the same time free of the rigidity that comes with SQL tables. It's nosql (cypher), but free from the lacking of proper relationship in Mongodb. it's the best of the both worlds.

Tell me more

Everything is a Node. You draw lines to connect them. And that's relationship. This is how a Node looks like:

This is how you connect these Nodes:

Why isn't it everywhere?

• Performance sucks compared to Postgres and Mysql.

• Important features like Sharding and Live Backup - are behind a very expensive corporate license.

• Their cloud service (Aura) starts at 65$/month. The service was announced in 2021. It's fully managed, and getting good traction.

• No support for querying nested properties/fields like MongoDB. Manually parsing JSON string is the way to go.

Give it a go

Query a Neo4j database using Cypher - Getting Started

A high-level overview of the graph query language Cypher.

neo4j.com