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

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 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…