[NoSQL][MongoDB] Truncate a collection

[Question] How do I truncate a collection in MongoDB or is there such a thing?

Right now I have to delete 6 large collections all at once and I'm stopping the server, deleting the database files and then recreating the database and the collections in it. Is there a way to delete the data and leave the collection as it is? The delete operation takes very long time. I have millions of entries in the collections.

[Answer]

To truncate a collection and keep the indexes use

 db.<collection>.remove({})

[출처] https://stackoverflow.com/questions/16493902/truncate-a-collection

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