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8 wrz 2016 · If you want to use in aggregation: db.emp.aggregate([. "$match": {. "type" : { "$in": ["WebUser", "User"] }, "city" : { "$in": ["Pune", "Mumbai"] } }, { "$group": { "_id": null, "ids": { "$push": "$empId" } } } ]) or simply use the distinct() method to return an array of distinct empIds that match the above query as:
2 lut 2024 · The following example demonstrates the use of $and and $or combined with the $in and $nin operators. We want to retrieve products based on multiple possible values for the ‘name’ attribute, as well as a specific price range:
3 lut 2024 · Using Aggregation for String Searching. Aggregation is another approach to search strings in MongoDB. You can use the $match and $regex operators in an aggregation pipeline to filter documents. The following example pipeline returns all posts where the ‘title’ field contains the string ‘MongoDB’.
2 lut 2024 · This article will teach you how to query with multiple conditions using multiple documents in MongoDB. $and and $or operators are explained briefly with examples of each. MongoDB provides the user with different logical query operators, $or and $and operators are one. But first, let’s look at the table of contents for this article.
2 lut 2024 · Working with string data in MongoDB is a vast topic with numerous functions and operators to explore. From basic CRUD operations to advanced aggregations and transformations, this tutorial provided a foundation to embark on more intricate MongoDB string manipulations in your next project.
One of the most powerful features of MongoDB is its ability to find documents that match multiple conditions. This can be done using the `$and` operator, which allows you to specify multiple conditions that must be met for a document to be returned.
Examples. Use the $in Operator to Match Values in an Array. Use the $in Operator with a Regular Expression. $in. The $in operator selects the documents where the value of a field equals any value in the specified array. Compatibility. You can use $in for deployments hosted in the following environments:
