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Quickly Removing Duplicates from MongoDB

DZone's Guide to

Quickly Removing Duplicates from MongoDB

· Database Zone
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Check out the IT Market Clock report for recommendations on how to consolidate and replace legacy databases. Brought to you in partnership with MariaDB.

If you've acquired some duplicates in MongoDB that you want to get rid of, this post from Michael Francis provides a how-to on cleaning them up. The best option, obviously, is not to duplicate things in the first place - you're welcome - but Francis' post is focused on solving the problem after the fact, and he explains some helpful techniques.

The basic idea of Francis' strategy is to hash your documents to find duplicates and store them in a pair of arrays for easy disposal. He has some extra tips and shortcuts depending on how you're working with MongoDB - Node.js and Mongoose makes it easier - but the basics should translate pretty well from language to language.

Check out Francis' full post and see if it can help you clean up your data.

Interested in reducing database costs by moving from Oracle Enterprise to open source subscription?  Read the total cost of ownership (TCO) analysis. Brought to you in partnership with MariaDB.

Topics:
java ,nosql ,architecture ,tips and tricks ,tools & methods ,remove duplicates ,mongodb ,hash

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