MongoDB

MongoDB is a database that provides powerful document-oriented storage. MongoDB stores data in JSON-like documents with dynamic schemas. It is easy to understand and scale. It has an in-built map-reduce function, which provides high performance data aggregation. MongoDB is a document-oriented database that stores data in JSON-like documents with dynamic schemas. It is easy to understand and scale. It has an in-built map-reduce function, which provides high performance data aggregation.

What is the select query equivalent in PyMongo/MongoDB native query?

The TLDR answer: Coming from the SQL domain, you might stumble upon requirement of writing a select <field_1>, <field_2> from xyz in Mongodb. It might be a little tempting to not use select query, but try to avoid doing it, since it might be

How to check MongoDB ObjectId valid in JS?

The TLDR answer: If you are using mongoose [https://mongoosejs.com/docs/] as your ORM layer for MongoDB in any of the NodeJS frameworks then one of the simplest and best ways I have come across is if (!mongoose.Types.ObjectId.isValid(object_id)) { throw "Invalid id"; }