Check if a Collection Exists in MongoDB Using NodeJS To find if a collection exists, we first need to connect with the MongoDB server, and then we need to query like this: dbs.collection("Your_collection_name").find().toArray(function(err, res) {if ( res.length > 0 ){console.log...
Nothing will be shown afterdb.mycol.find()as all data is removed from databases. This article taught us how to drop or remove collections in MongoDB. The drop() method drops the collection and its indexes, while the remove method deletes a single or all the documents from the collection....
Now, we’re going to create your collections in the cluster so that we can insert our data. They need to be created now so that you can create an Atlas trigger that will target them. For this tutorial, you can create your own collection if you have data to use. If you’d like to...
2) Find – This method is used to retrieve array elements from collections. We can also use the find method with an array query operator to retrieve specific array elements in MongoDB. 3) Array field name – This parameter is defined as the name of the array field from which we have re...
2) Find – This method is used to retrieve data from collections. We can also use find method with query operator to retrieve specific documents in MongoDB. 3) Field name – This parameter is defined as the name of the field from which we have retrieving data as per the query parameter...
mongodump -d<database_name>-o<directory_backup> Example: mongodump -d ngdeveloper-0D:\ngdeveloper\mongodb-exports\ MongoDB Import Command to import all the collections of the database: mongorestore -d<database_name><directory_backup> ...
I want to have something similar in MongoDB can somebody help me? Note that the following solution only applies to versions ofMongoDb You can't do what you want in just one query. First you have to retrieve the list of friend user ids, then pass those ids to the second query to retr...
mongorestore (version 100.9.4 or higher): The mongorestore tool loads data from a binary database dump. The dump directory includes a demo database with preloaded collections, views and indexes, to get you up and running in no time. This tool is part of the MongoDB Database Tools packag...
How to monitor self-managed MongoDB instances:Commands such asrs.status()for replica sets andsh.status()for sharded clusters provide a high level status of the cluster. Use MongoDB’s built-infree monitoringfeature to get information on Operation Execution Times, Memory Usage, CPU Usage, and ...
> db.test.find().pretty(); https://www.runoob.com/mongodb/mongodb-databases-documents-collections.html https://www.runoob.com/mongodb/mongodb-query.html VSCode & MongoDB client https://marketplace.visualstudio.com/items?itemName=cweijan.vscode-database-client2 ...