Mongodb

Mongodb is a nosql database that bring a lot of innovation in the javascript ecosystem

Mongo let us do complex queries using aggregation framework

We can use $lookup to join 2 collections, or many other operations as we need

Mongo is great because it is close to javascript to do queries and updates.

compound indexes

• https://emptysqua.re/blog/optimizing-mongodb-compound-indexes/

• http://www.askasya.com/

To speed up your queries move most of index filtering processing to the top

• https://amyportela.github.io/posts/mongodb_index_explain.html