If you have relational data in your MongoDB instance, you can perform an operation similar to a JOIN typically done in SQL queries.

When it comes to reading data out of your MongoDB instance you have two options, a query using the standard query language or an aggregation pipeline. While you can often use either for many use cases, there are differences in how they are used and what use cases they are a good fit for.

For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. MongoDB provides a special update operator $[] to apply an update operation to all elements in an array belonging to matching documents. With the following data inserted into a collection called

You can update existing documents in MongoDB and if you want to update only one document at a time you have three main options. You can use the update method to update one document. By default, it will only update one document, even if the query provided matches multiple documents.

For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. If you want to explicitly create a new collection in MongoDB rather than letting it be automatically created when an insert operation happens, you can do so using the createCollection

If you want to find out all the different values for a field across all the documents in a collection, you can use the ready-made distinct aggregation method to find that out.

For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. Not only can you insert a single document into a collection [https://donaldfeury.xyz/how-to-insert-a-single-document-into-a-mongodb-collection/] with the insert method, it can also take in an array of documents for bulk

For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. MongoDB has several ways of inserting documents into collections. The main way is using a method on collections called insert. Here is an example: // Let's say we want to insert

For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. MongoDB has a few ready-made aggregations available as methods and one of those is count. It can be used to determine how many documents are in a collection or returned

For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. After using the find method to get retrieve some documents from MongoDB [https://donaldfeury.xyz/get-all-the-documents-out-of-a-collection-in-mongodb/] and further trimming down that result using filters [https://donaldfeury.xyz/how-to-retrieve-specific-documents-from-mongodb-using-filters/] , there may

For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. While you can use the find method to read data back out of MongoDB [https://donaldfeury.xyz/get-all-the-documents-out-of-a-collection-in-mongodb/] and the findOne method is a MongoDB query to pull specifically one

For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. While you can use the find method to read multiple documents out of MongoDB [https://donaldfeury.xyz/get-all-the-documents-out-of-a-collection-in-mongodb/], it is more likely you only want a subset of that data.

For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. MongoDB has a convenient method called findOne which is very similar to the find method, except it, returns the actual document instead of a cursor and it will only return

For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. The most simple way to read all the documents out of a collection in MongoDB is to use the find method on a collection. Let's say you have a collection