Queries in MongoDB

You can use the following syntax to select a random sample of documents from a collection in MongoDB: db.myCollection.aggregate([ { $sample: {…

You can use the $ne operator (which stands for “not equal”) in MongoDB to query for documents where a field is not…

You can use the following operators in MongoDB to perform greater than or less than queries: $lt: Less than $lte: Less than…

You can use the $or operator in MongoDB to query for documents that meet one of multiple criteria. This operator uses the…

You can use the $and operator in MongoDB to query for documents that meet multiple criteria. This operator uses the following basic…

You can use the following basic syntax to find a document by id in MongoDB: db.collection.find(ObjectId(‘619527e467d6742f66749b72’)) The following examples show how to…

You can use the following syntax to query for all documents where the value for a particular field is not in a…

You can use the following syntax to query for all documents where a specific field is not null in MongoDB: db.collection.find({“field_name”:{$ne:null}}) The…

You can use the following basic syntax to perform a query with a date range in MongoDB: db.collection.find({ day: { $gt: ISODate(“2020-01-21”),…

You can use the following methods to perform a query in MongoDB with “like” regex: Method 1: Find Documents that Contain String…