From the course: MongoDB Python Developer Associate Cert Prep

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Querying a MongoDB collection in Python applications

Querying a MongoDB collection in Python applications

From the course: MongoDB Python Developer Associate Cert Prep

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Querying a MongoDB collection in Python applications

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- Hello. In this video you'll learn how to query a MongoDB collection by using the PyMongo driver. There are two methods that we can use to query in MongoDB. Find_one is used to return a single document that matches a query. Find is used to return all documents that match a query. Let's start with an example of the most basic type of query that can be performed in MongoDB, which is find_one. Find_one returns a single document that matches a query, or it returns none if there are no matches. Find_one is useful in cases where we know there is only one matching document, or if we're only interested in the first match. In this example we'll work with a database named bank that contains an accounts collection. Let's say we want to retrieve the document from the accounts collection that matches this _id value. It's appropriate to use find_one for this query because there can only be one document in a collection that matches any…

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