![]() Output the results into a brand new collection.Add the movie’s details into each comment.A pipeline is a set of steps each step is called a stage each stage does one thing and one thing only. On the aggregation tab, you’ll see the pipeline builder. To see the Aggregation tab, you need to click on the collection you want to investigate or use as the basis for your new collection. Constructing the aggregationĪggregations are one way you can build collections inside MongoDB, and there’s a tab for that, as shown in the image below. But to actually create the collection, we need to use aggregations. Using queries like that is great to see the preliminary results of the collection you are trying to build. From within the Collections tab, you can see the data and make simple queries if you want.įor example, the query above shows every document with a date value later than August 18th, 2002. My project is called “Project 0” and has the “Example” database comprising three databases and 15 collections.Įach project has a set of tabs, one of which is the “Collections” tab, where you can see the databases and the documents in each collection, as shown in the image above. Start by going into the project’s database. Your objective is to create a collection containing all the comments each movie received in August 2002. You’ll use the collection sample_mflix that contains movies, comments, users, etc. Whereas the records in a spreadsheet are lines, in MongoDB, a record is called a document. ![]() In Mongo, a dataset is called a collection think of it as a special spreadsheet. You’ll be using the sample data from MongoDB to learn how to do an aggregation and create a new collection. Remember that if you don’t have one yet, you can create one for free here, and MongoDB has a free tier you can set up while creating your account. This blog post assumes you already have an account set up with MongoDB. We CANNOT directly create / insert new document in view.If you use MongoDB, you probably understand all there’s to know about it, so I recommend you skip this blog post here, but if you are starting with MongoDB, see this blog post as a gentle introduction □. For example, when we insert a new document in user collection, the view will be automatically create and update a new document for it.
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