How to Merge Documents when Importing a File into MongoDB

When you use mongoimport to import files into MongoDB, you have the option of merging existing documents with the ones that you’re importing.

In this case, if an imported document has the same _id value as an existing one in the collection that you’re importing into, the existing document will be merged with the one being imported.

You can also specify another field (other than the _id field) to be the matching field if required.

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How to Replace Existing Documents when Importing a File into MongoDB

When you use mongoimport to import files into MongoDB, you have the option of replacing existing documents that match the ones you’re importing.

By this I mean, if an imported document has the same _id value as an existing one in the collection you’re importing into, the existing document will be replaced with the one being imported.

You can also specify another field (other than the _id field) to be the matching field if required.

The way to replace existing documents when using mongoimport is to use upsert mode.

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Import a CSV 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 CSV file into MongoDB.

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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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