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MongoDB Aggregation $first Operator
MongoDB's aggregation framework offers a rich set of operators for data manipulation and analysis. One such operator is $first, which retrieves the first document from a g...
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MongoDB
Databases
Single Field Indexes In MongoDB
In MongoDB, indexes play a crucial role in improving query performance by efficiently locating and retrieving documents from collections. One type of index commonly used i...
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MongoDB
Databases
MongoDB Aggregation $lookup
The $lookup operator in MongoDB is a powerful tool for performing join-like operations between documents from two collections. It allows us to perform join operations whic...
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MongoDB
Databases
Aggregation Pipeline Limits
In MongoDB, the aggregation pipeline is a powerful tool for processing and transforming data within collections. Among its many stages, the $limit stage is particularly us...
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MongoDB
Databases
How to Rename Fields in MongoDB
In MongoDB, the $rename operator offers a straightforward way to rename field names within documents. This operator functions by first using $unset to delete the existing ...
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MongoDB
Databases
What is Mobile Application Security?
In the present world of digitalization mobile applications have changed how we interact with technology to give us the advantage of convenience, accessibility, and functio...
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Computer Networks
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Cyber-security
Seasonal Rhythm| Class 11 Geography Notes
Seasonal Rhythm is a subpart of the Class 11 Geography Chapter "Climate and Vegetation". The Seasonal Rhythm tells us about the various occurrences related to the regular ...
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School Learning
Class 11
School Geography
Chapterwise-Notes-Class-11
Social Science
Uses of Rectifier
Rectifiers are two-bit electronic gadgets that are used to convert alternating current (AC) to direct current (DC). Enabling power conversion is their principal applicatio...
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School Learning
School Physics
Real Life Application
How to Configure Terrform Using Ansible ?
In the present rapidly advancing technological scene, the demand for versatile, reliable, and cost-effective infrastructure arrangements is higher than ever time in recent...
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DevOps
Ansible
Terraform
How to Create AWS Billing Alarm ?
In this article, we will see how to create an billing alarm. We can create alarm to estimate the AWS charges by using Amazon CloudWatch. The AWS account's estimated costs ...
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AWS
Amazon Web Services
Uses of Barometer
Barometer is a device that is used to predict weather conditions. It was created originally to measure the atmospheric pressure. Barometer is generally used for weather fo...
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School Learning
School Physics
Real Life Application
PL/SQL Query to List the Last 25% Rows in a Result Set
We sometimes need to fetch some specific rows from our result set. There are many reasons to do so. When we are working on real-time analytics, focusing on recent data is ...
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Databases
PL/SQL
PL/SQL Query
What is an Extension of Entity Type?
Entity Type Extensions are a key issue with a database management system (DBMS) that helps to develop the current entity types without messing with the main structure. In ...
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Databases
How to Connect to MySQL Server
MySQL is a widely utilized open-source relational database management system (RDBMS) known for its popularity and effectiveness in handling and structuring massive amounts...
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Databases
MySQL
Using LENGTH() Function in SQL
Understanding the length of strings within a database is a fundamental aspect of effective data management and analysis. In the world of SQL, the LENGTH() function provide...
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SQL
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