The $lookup stage in MongoDB's aggregation framework allows you to perform a left outer join to a collection in the same database. This stage is useful for combining documents from…
Suppose we have collection of documents having array and we want to update document having array on the basis of some condition. Insert document in movies collection db.movies.insertMany([ { title:…
The legacy mongo shell is no longer included in server packages as of MongoDB 6.0. mongo has been superseded by the new MongoDB Shell (mongosh) which is available separately: Download and Install mongosh The MongoDB Compass admin…
Radom data is useful to test many scenarios and check our code stability in many ways. We can get random documents from given collection. Solution 1: Using $sample Randomly selects…
We can use various approaches to get the last n record from database. Let find out which approach suits you. You can use combination of the sort() , limit() ,skip() to get the…
We have various ways to achieve the result. However, we will discuss here two methods. 1. Distinct db.collection.distinct(field, query, options) Finds the distinct values for a specified field across a…
Mongoose schemas support a timestamps option. If you set timestamps: true, Mongoose will add two properties of type Date to your schema: createdAt: a date representing when this document was createdupdatedAt: a date representing when…
While working on any project where we may have a requirement to check the size of an array or to get an element whose size is greater or less than…
