![]() ![]() Wait a few minutes and you will have a brand new MongoDB Atlas cluster built in the Cloud Provider and Region of your choosing. In this example, I am going to pick Azure Virginia-East2 (eastus2) and update the Cluster Name to be “DevCluster.” Then click “Create Cluster.” Start by clicking on the “Build Cluster” button and select the Free option. Once the initial setup is complete, it is time to build a free MongoDB cluster in a few easy steps.MongoDB Atlas provides a self-explanatory wizard to create the Organization, Project, and admin user components for the initial setup.The steps to create your MongoDB Atlas cluster in the Cloud are: Please see our triggers snippets for more ideas. However, there are endless possibilities for trigger usage to cover your specific use case. This is a simple example to showcase how easy it is to set up a trigger. That will update the “lastupdated” field on an insert of a new document in the “sample_mflix.movies” collection (which is part of the sample datasets provided by MongoDB). Then we’ll build out a use case using database DDL triggers. Data Events: To add a trigger as part of a complex series of events happening in a collection-for example, a report generated after a set of data added or a notification sent back to users when enough participants have joined a given game.įirst, we’ll start up a free MongoDB Atlas account and then populate the database with sample data.Using a trigger can help ensure that happens before a transaction has been committed. Data Integrity: To add conditional logic, to ensure that a set of fields has a valid combination of data-for example, to make sure the order record’s Begin Date is before an order record’s End Date.For that, a trigger can be created to perform that function, ensuring the data is consistent, independent of the format of the incoming City field. Data Consistency: To make sure that data entered into the database is in a consistent format-for example, to make sure the City field on a database is UPPERCASE.Using triggers to record that information in a Last Updated User field would meet that requirement. For example, a compliance team has the business requirement of recording who updated any of the records. Audit: To add fields in the database that capture who made a change on a record. ![]() There are many reasons to use triggers in a database: What Are the Main Purposes of Triggers in a Database? ![]()
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