Mongodb count duplicate values. Therefore, it's essential to identify and handle duplicates effectively to maintain data integrity. Learn how to remove duplicate records in MongoDB using a simple query. match those groups having records greater than 1 (the duplicates). This article will guide you through finding and removing Nov 9, 2021 · mongodb count duplicates aggregation Follow this question to receive notifications edited Nov 10, 2021 at 11:03 mousetail Feb 29, 2012 · For a generic Mongo solution, see the MongoDB cookbook recipe for finding duplicates using group. Mar 18, 2025 · In many MongoDB applications, duplicate records can arise due to concurrency issues, data ingestion errors, or application logic bugs. Delete duplicate records from the original collection, keeping one original . Identify duplicate records based on a key. Nov 17, 2021 · This tutorial explains how to find duplicate values in MongoDB, including several examples. how to get the duplicate doc… Jul 22, 2024 · Hi @Mohammad_Yusuf_Ghazi , It looks like you are facing a problem because you are doing a group and after that you need to access your full document. Jul 23, 2025 · Duplicates in a MongoDB collection can lead to data inconsistency and slow query performance. This step-by-step guide will show you how to identify and remove duplicate records from your MongoDB database, so you can keep your data clean and organized. Insert duplicate records into a new collection, ensuring full documents are copied. Count occurrences of duplicate valuesHow do I structure my MongooseJS/MongoDB query to get total duplicates/occurrences of a particular field value? I have added unique key for name field after that I have drop the indexes and I am trying to create indexes I am getting duplicate error because we have duplicate documents in the collection. Oct 18, 2021 · In this post, I describe how to find duplicated documents in a MongoDB collection using a query or a GUI. group by name but first change the case to lower case and push the docs to the duplicates array. In this article, we'll explore various methods of how to find duplicates in MongoDB collections and discuss how to use them with practical examples and Sep 2, 2023 · 📝 Tech Blog: Unraveling Duplicate Records in MongoDB Are you tired of dealing with duplicate data in your MongoDB collection? 🔄 It's time to put an end to the confusion and clutter! Feb 16, 2023 · In this blog post we record useful MongoDB operations in regards of finding and removing duplicate documents, as this is a common problem developers face. Note that aggregation is faster and more powerful in that it can return the _id s of the duplicate records. So, let’s break down your requirements. znpca dchoz nmyjyar chxlwh haxmevrn jkxlb obalhc xivoxr ehpwja hxlna