Database Management Systems
When using MongoDB, you can use mongoimport to import documents into a collection. mongoimport is a command line utility that imports content from an Extended JSON, CSV, or TSV file. The import file could have been created by mongoexport or some other export utility.
This article presents examples of importing a JSON file into MongoDB.
Continue readingWhen using mongoimport to import files into MongoDB, you have the option of specifying a mode to use. These modes determine what happens if there’s already matching documents in the collection that you’re trying to import into.
By default, mongoimport uses insert mode, but there are other modes you can use. The mode you use will depend on what you’re trying to do.
Below is an overview of each mode along with examples.
Continue readingThe MongoDB Database Tools include a utility called mongoexport that enables you to export MongoDB data to a CSV or JSON file.
One of the things you can do with this utitlity is export query results. This article shows you how to use mongoexport to export MongoDB query results to a CSV file.
The MongoDB Database Tools include a utility called mongoexport that enables you to export MongoDB data to a CSV or JSON file.
One of the things you can do with this utitlity is export query results. This article shows you how to use mongoexport to export MongoDB query results to a JSON file.
The MongoDB Database Tools include a utility called mongoexport that enables you to export MongoDB data to a CSV or JSON file.
This article shows you how to use mongoexport to export a MongoDB collection to a JSON file.
The MongoDB Database Tools include a utility called mongoexport that enables you to export MongoDB data to a CSV or JSON file.
This article shows you how to use mongoexport to export a MongoDB collection to a CSV file.
If you have a view in a MongoDB database that you’d prefer to be a collection, you’re in the right place.
Below is an example of converting a view to a collection in MongoDB.
Continue readingIn MongoDB the db.collection.countDocuments() method returns the count of documents that match the query for a collection or view.
The collection part is the name of the collection or view to perform the count operation on.
In earlier versions of MongoDB, you could use the copyDB command or its helper method, db.copyDatabase() to copy a database.
MongoDB has since deprecated these. Also, starting in version 4.2, MongoDB has removed the copydb command, and therefore also the db.copyDatabase() method, which means that you can’t use them even if you wanted to if you’re using MongoDB 4.2 or later.
Fortunately, there’s another way to copy a MongoDB database.
Continue readingIn earlier versions of MongoDB, you could use the db.collection.copyTo() method to copy a collection.
MongoDB has since deprecated that method. Also, starting in version 4.2, MongoDB has removed the eval command. Given db.collection.copyTo() wraps eval, this means that you can’t use either of them if you’re using MongoDB 4.2 or later.
Fortunately, there’s another way to copy a MongoDB collection.
Continue reading