Querying in MongoDB

This section will show the use of the sample_mflix.movies collection as an example for demonstration. Working with real data with some expected query results helps reinforce the acquired notions and makes understanding the underlying processes easier and more thorough.

The most frequent MongoDB query language commands—and the ones that this chapter will be covering—are as follows:

• find(): Finds and selects documents matching simple or complex criteria
• insertOne(): Inserts a new document into the collection
• insertMany(): Inserts an array of documents into the collection
• updateOne() and updateMany(): Update one or more documents according to some criteria
• deleteOne() and deleteMany(): Delete one or more documents from the collection

There are 21,349 documents in the sample_mflix.movies collection. To query for all the documents, type the following command in the MongoDB Shell:

db.movies.find()

The preceding command...