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3 lut 2024 · MongoDB provides several tools for converting string data to numeric types, which are vital for analyses and operations that require numeric precision. By following the techniques and patterns outlined in this tutorial, you’ll be equipped to ensure your data types align with your application’s logic and MongoDB’s performance strengths.
- MongoDB: How to set your own _id field value (with examples)
Example: Using Numbers as _id db.collection.insertOne({ _id:...
- MongoDB: How to set your own _id field value (with examples)
5 kwi 2015 · String can be converted to numbers in MongoDB v4.0 using $toInt operator. In this case. db.col.aggregate([ { $project: { _id: 0, moopNumber: { $toInt: "$moop" } } } ]) outputs: { "moopNumber" : 1234 }
Returns the numerical value of the string as an integer. The string value must be a base 10 integer (e.g. "-5", "123456") and fall within the minimum and maximum value for an integer.
The $type query operator accepts either a string alias or a numeric code corresponding to the data type. See BSON Types for a list of BSON data types and their corresponding numeric codes. For example, these checks for the Decimal128 type are equivalent:
3 lut 2024 · Example: Using Numbers as _id db.collection.insertOne({ _id: 101, name: 'Jane Doe', age: 29, occupation: 'Data Scientist' }); This example demonstrates using a numerical value as the _id , allowing for numeric operations and ordering based on the _id .
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.
The types specified in the array can be either numeric or string aliases. See Querying by Multiple Data Types for an example. Available Types describes the BSON types and their corresponding numeric and string aliases.
