If the collection exists in the database and will be deleted successfully, the result will betrue. The result will befalseif the collection does not exist in the database and can’t be removed appropriately. To
Delete Collection Using the drop() Method Delete All Documents From the Collection Using the remove() Method Use Command-Line to Drop Database in MongoDB In this article, the problem of deleting collections in MongoDB will be discussed in detail, and different methods used in MongoDB to...
MongoDB installed (follow our guide toinstall MongoDB on Ubuntu). Access to thecommand line/terminal. Method 1: Create a Collection in MongoDB via createCollection() The first way to create a collection is to use the built-increateCollection()database method. There are four different collecti...
1. Tailing the MongoDB Oplog At the heart of MongoDB’s native replication system is theoplog (operation log), a capped collection that logs every write operation—insert, update, and delete—performed on your MongoDB cluster. By tailing the oplog, you can stream CDC events from the source...
ragas: Python library for the RAGAS framework langchain: Python library to develop LLM applications using LangChain langchain-mongodb: Python package to use MongoDB Atlas as a vector store with LangChain langchain-openai: Python package to use OpenAI models in LangChain pymongo: Python driver fo...
There are two ways to shard a collection in MongoDB. Both ways use thesh.shardCollection()method: Range-based shardingproduces a shard key using multiple fields and creates contiguous data ranges based on the shard key values. Hashedshardingforms a shard key using a single field's hashed inde...
To follow along, you can use these MongoDB Playground files I have created to accompany this blog post or create your own! 💡 If you create your own playground, remember to change the database name and delete the default template's code first! $unionWith using a pipeline 📃 Use this ...
Mongoose provides 4 different ways to remove a document from a MongoDB collection. These methods include deleteOne(), deleteMany(), and findOneAndDelete(). deleteMany() method The deleteMany() method removes all documents that match the given conditions from the MongoDB collection. It returns an...
// other fields. // Run this in the MongoDB shell [db.<collection1>, db.<collection2>].forEach(function(collection) { collection.find({}).forEach(function(x) { delete x._id; collection.save(x); }); });
Alternatively, you canretrieve the documentfrom the MongoDB collection, set the value of the field you want to delete toundefinedand then save it. In Mongoose, setting a document field toundefinedwill send$unsetcommand to MongoDB: // Retrieve documentconstuser=awaitUser.findOne({name:'Alex'})...