Consider the following examples with the following documents in the numbers collection: { "_id" : 1, "val" : NumberDecimal( "9.99" ), "description" : "Decimal" } { "_id" : 2, "val" : 9.99, "description" : "Double" } { "_id" : 3, "val" : 10, "description" : "Double"...
MongoDB provides various functions to work with Int32 data type. Some common functions includeInt32(),$toInt, andNumberInt(). Let’s explore how to use these functions with code examples. 1. Int32() TheInt32()function is used to create an Int32 object in MongoDB. You can pass an i...
In this article, we will walk through MongoDB join two collections using practical examples and explore how to filter joined data using $lookup features like the where clause and the compass operator. Let’s get started! What is MongoDB? MongoDB is a non-relational Database Management System...
db.data.find({x:{$type:"minKey"} } ) The following query will return the document with_id: 2: db.data.find({y:{$type:"maxKey"} } ) Examples Querying by Data Type TheaddressBookcontains addresses and zipcodes, wherezipCodehasstring,int,double, andlongvalues: ...
To set the value of a field in a MongoDB document, you can use theinsertOne()orupdateOne()methods along with the appropriate data type. Here are some examples of how to set different value types in MongoDB: String ```javascript
Query an Arrayfor dot notation examples with arrays. Embedded Documents To specify or access a field of an embedded document with dot notation, concatenate the embedded document name with the dot (.) and the field name, and enclose in quotes: ...
database before, you can think of relational databases like spreadsheets where data is structured and each entry is generally a row in a table. Relational databases are generally controlled with SQL or Structured Query Language. Examples of popular relational databases areMySQL,SQL ServerandPostgreSQL...
Query on Arraysfor dot notation examples with arrays. Embedded Documents To specify or access a field of an embedded document with dot notation, concatenate the embedded document name with the dot (.) and the field name, and enclose in quotes: ...
One of the main use cases for choosing document databases is when you have data that doesn’t neatly fit into a predefined schema like a table. Many processes or applications in industries store these types of data. Here are some examples: Web and mobile apps: User profiles, preferences, co...
{// Use connect method to connect to the serverawaitclient.connect();console.log('Connected successfully to server');constdb=client.db(dbName);constcollection=db.collection('documents');// the following code examples can be pasted here...return'done.';}main().then(console.log).catch(...