To remove all documents in a MongoDB collection (from the command line) use the remove function, and give it an empty set of parentheses, like this: // remove all documents in the "stickynotes" collection db.stickynotes.remove({}) You can do the same thing from your Java, Scala, Ru...
When we execute the remove() method applied on any collection in MongoDB database then, the writeResult object will return the status of the operation performed. Syntax The MongoDB Remove method includes two basic syntaxes implemented for removing any collection from MongoDB database described as...
i would to remove duplicate data according to X and y when they are the same values so in this case (need to remove when z=3 and z =4) i use db.collection.aggregate([{"$sort":{"_id":1}},{"$group":{"_id":"$x","doc":{"$first":"$$ROOT"}}},{"$replaceRoot":{"newRo...
publicDeleteResultdeleteProductDataForIds(List<ProductId> productIds) {Queryquery =Query.criteria(Criteria.where("_id").in(productIds));returnmongoTemplate.remove(query,Product.class);//Query: { "_id" : { "$in" : [ { "$java" : ProductId@6d969330 }, { "$java" :...
If you try to drop a collection in the admin database or the config database from amongossince MongoDB 5.0, the drop command and thedb.collection.drop()function will produce an error. Instead, connect to the config server and perform the command to remove these collections. ...
Today, we will learn how to use $pull, $pullAll, $pop, $unset, and the positional operator ($) to remove an element from an array or array of documents while working in MongoDB.MongoDB Remove Element From an ArrayWe must have a sample document(s) collection to practice all the ...
Implementing Document Expiration in MongoDB using Mongoose and Node.js Introduction When working with MongoDB, it is often necessary to automatically remove documents from a collection after a certain period of time. This can be useful for managing things like session data or logs, where you only...
Use Mongo Shell to connect to MongoDB Type “mongo” to launch the mongo shell and connect to MongoDB to perform some database operation. This will display the “> ” prompt where you can type mongo client commands. # mongo MongoDB shell version: 2.2.2 ...
The practice of synchronizing data across multiple separate databases is called replication. In MongoDB, a group of servers that maintain the same data set t…
MongoServerError: Exceeded memory limit for $group, but didn't allow external sort. Pass allowDiskUse:true to opt in. if I remove{ allowDiskUse: true}. The index is only about 37M. How can sorting need more than 100M? Daniel_Li1(Daniel Li)September 18, 2023, 3:16pm6 ...