![]() With our instructions and examples, you’ll be prepared to use these operators in your own MongoDB queries. We showed you how to use the $filter and $elematch operators to filter array elements in MongoDB and provided examples of their use. In this article, we focused on the process of filtering elements in an array. "_id" : ObjectId ( "5e9667164d513751c0000a4f" ),īecause it’s possible for an array to be stored as the value of a field in MongoDB, it’s important to know how to work with this type of data in your queries and commands. Here’s an example of how we can use the $filter operator: as – This optional field contains a name for the variable that represent each element of the input array.cond – This represents the set of conditions that must be met.input – This represents the array that we want to extract.The $filter operator allows us to further refine the results of a MongoDB query. Filter MongoDB Array Element Using $Filter Operator You may want to create a MongoDB collection containing these documents so that you can follow along with our examples. You can also create tables in traditional way to put your structured data but the main purpose is to store unstructured data in the form of object which may vary based on a particular requirement. "review" : "interestingly good performance" Soumitra 1 Comment MongoDB is one of the most popular NoSQL database where data are stored in the form of documents. "review" : "rock solid graphic performance" Here, we match the values and return only those documents where the gender value is Male and also apply the sort() method for displaying the documents in descending order as per the name field."_id" : ObjectId ( "5e9662f3e4d449ab15e94881" ), The projection parameter takes the documents in the following form: ) It is used to return all fields in the matching documents. Use to return documents that match the query filter. ![]() Delete Multiple Documents You cannot delete multiple documents at once from the Compass UI. Select the appropriate tab based on whether you are viewing your documents in List, JSON, or Table view: Once you confirm, Compass deletes the document from the collection. Use this parameter to return all the documents of a collection. Important Deleting documents is not permitted in MongoDB Compass Readonly Edition. Syntax: db.Collection_name.find(query, projection) Parameter Here, we also cover an example that will help you to understand how to find out the documents with multiple values. In this topic, we discuss the query that is used to find multiple values or documents from the documents. When we have large data set and we only want to find the documents of a particular value in that situation we use aggregation operations. To find the multiple values, we can use the aggregation operations that are provided by MongoDB itself. The find() method returns a cursor of the result set and prints all the documents. MongoDB provides the find() that is used to find multiple values or documents from the collection. Returns an array with only those elements that match the condition. ![]()
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