MongoDBeasy

MongoDB basics: what is a document and a collection?

Answer

A document is a JSON-like record (BSON) with fields; a collection is a group of documents (like a table, but schema is flexible). Documents typically have an `_id` as a primary identifier.

Related questions

MongoDB

MongoDB document-level atomicity: what does it guarantee?

#mongo#atomicity#document

MongoDB

How does a unique index work in MongoDB (and why do you need it)?

#unique-index#concurrency#mongodb

MongoDB

`$push` vs `$addToSet` — what’s the difference?

#mongodb#arrays#update

MongoDB

What does `upsert: true` mean in MongoDB updates?

#upsert#update#mongodb

MongoDB

In MongoDB updates, what does `$set` do?

#mongodb#update#set

MongoDB

MongoDB transactions — when are they useful and what’s the cost?

#transactions#mongodb#performance