A “New Shell” window will appear in the right side pane of the window.Īt this point, we’re ready to perform an aggregation operation. To interact with that database, right-click on warlordDatabase, then select Open Shell in the menu. In this tutorial, we’ll be using the database warlordDatabase. You can see an example of this in the screenshot shown below: If Robo 3T successfully connected to a MongoDB deployment, it will list all the database(s) available within that connection. Performing Aggregation in a MongoDB Database using Robo 3T Robo 3T is a free and machine friendly software, that uses a small number of one’s resources available on a machine. The sample dataset shown below will be used throughout this tutorial: Use a SQL LIKE statement in MongoDB with the find command and search for word similarities using regex on your MongoDB database. If you plan to follow along with the examples in this tutorial, it’s helpful to be using the same data. To do this, open up the Robo 3T application and click the Connect button found at the lower right corner of the MongoDB Connections window: The first step will be to connect Robo 3T to a MongoDB deployment. Once you’ve confirmed that all the prerequisites are in place, you’re ready to get started with Robo 3%. How to Install and Setup a MongoDB Server on MacOS How to Install and Setup MongoDB on Windows NOTE: If MongoDB has not yet been installed, you can refer to the following articles for instructions on how to install MongoDB on different operating systems: You’ll also need to ensure that Robo3T has been properly installed beforehand. You’ll need to make sure that MongoDB has been properly installed and is running in the background. There are a couple of important prerequisites: Prerequisitesīefore we look at some examples of aggregations, let’s take a moment to discuss the system requirements needed for this task. MongoDB is an open source, document-oriented database, which instead of storing data in tables and rows as would be done with a relational database, stores JavaScript Object Notation (JSON)-like documents with dynamic schemas. In this article, we’ll learn how to perform aggregation operations using the MongoDB Robo 3T GUI. Description: Robo 3T is a shell-centric, cross-platform, open source MongoDB management application. Although there are many tasks you can perform using Robo 3T, this tutorial will focus on aggregations. Unlike other MongoDB user interfaces that simply emulate the Mongo shell, Robo 3T actually embeds the shell, offering users access to a command line interface as well as a user-friendly GUI. Robo 3T, formerly known as Robomongo, is a free, open-source GUI for MongoDB that’s fast and efficient to use. Here the -1 indicates that we want to return the documents based on the descending order of Employee id.If you’d prefer to use a visual interface when you perform MongoDB operations, Robo 3T may be a natural choice for you. All three can be used to return information on query plans and the execution statistics of those query plans. Click on the button to the right and the regular expression editor is displayed: The Regular Expression editor in Studio 3T. MongoDB provides an ‘explain’ facility that gives you a tool for troubleshooting queries, which comes in three flavors: db.collection.explain () method. Our parameter is now going to be a regular expression and we can see // in the parameter field. The above code takes the sort function which returns all of the documents in the collection but then uses the modifier to change the order in which the records are returned. Selecting RegEx for a MongoDB match in Studio 3T.db.Employee.find().sort().forEach(printjson) Code Explanation: The following example shows how this can be done. One can specify the order of documents to be returned based on ascending or descending order of any key in the collection. The output clearly shows that since there is a limit modifier, so at most just 2 records are returned as part of the result set based on the ObjectId in ascending order. If the command is executed successfully, the following Output will be shown
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