Import a JSON File into MongoDB with mongoimport

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.

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Copy/Clone a Database in MongoDB

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.

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Copy/Clone a Collection in MongoDB

In 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.

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