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Data Warehousing Concepts in SQL: Understanding Star and Snowflake Schemas

Table of Contents Introduction What Is a Data Warehouse? OLTP vs OLAP: The Need for Warehousing Key Components of a Data Warehouse What Is Dimensional Modeling? Facts and Dimensions Explained The...
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SQL with APIs and JSON Fields in PostgreSQL: Working with Semi-Structured Data

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SQL for Data Engineering: ETL Concepts and Building Scalable Data Pipelines

Table of Contents Introduction What Is Data Engineering and Why SQL Matters Understanding ETL (Extract, Transform, Load) SQL’s Role in Each ETL Stage Data Sources: Raw Data Ingestion with...
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SQL for Data Analysis: Deep Dive into KPIs and Cohort Analysis

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Error Handling in SQL: Managing Exceptions and Ensuring Reliable Transactions

Table of Contents Introduction Why Error Handling Matters in SQL Types of Errors in SQL Syntax Errors vs Runtime Errors Understanding Transaction Errors Rollbacks for Safe Error Recovery Error Handling in...

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Stored Procedures and Functions in SQL: Encapsulating Logic for Reuse and Automation

Table of Contents Introduction What Are Stored Procedures and Functions? Benefits of Using Stored Routines Stored Procedures vs Functions: Key Differences Syntax for Creating Stored Procedures Executing a Stored Procedure Parameters...

Triggers in SQL: Automating Database Behavior

Table of Contents Introduction What Is a Trigger in SQL? Why Use Triggers? Types of Triggers Syntax of a Trigger BEFORE vs AFTER Triggers INSERT, UPDATE, and DELETE Triggers Trigger Events: Row-Level...

Using Constraints in SQL: NOT NULL, UNIQUE, CHECK, and DEFAULT

Table of Contents Introduction What Are Constraints in SQL? Why Use Constraints? NOT NULL Constraint UNIQUE Constraint CHECK Constraint DEFAULT Constraint Combining Multiple Constraints Adding Constraints to Existing Tables Dropping Constraints Naming Constraints for Clarity Column-Level...

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Docker Compose for Multi-Container Applications

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Table of Contents What is Docker Compose? Why Use Docker Compose? Installing Docker Compose Understanding docker-compose.yml Creating a Multi-Container Application Managing Services with Compose Networking in Docker Compose Volumes and Data Persistence Best...

Docker Basics — Containerization for DevOps

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Table of Contents What is Docker? Understanding Containers vs Virtual Machines Why Docker for DevOps? Installing Docker Key Docker Concepts Building Docker Images Dockerizing a Simple Application (Step-by-Step) Managing Containers Best Practices for...

Introduction to Continuous Delivery (CD)

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Table of Contents What is Continuous Delivery (CD)? Continuous Deployment vs. Continuous Delivery The Importance of CD in DevOps Key Components of a CD Pipeline Automating Deployment to Staging...

Introduction to Continuous Integration (CI)

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Table of Contents What is Continuous Integration? Why CI is Crucial in DevOps Pipelines Core Components of a CI System Designing a CI Pipeline: Step-by-Step Breakdown CI Implementations with...

Version Control Systems with Git

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Table of Contents Introduction to Version Control Systems (VCS) Understanding Git Fundamentals Cloning a Repository Committing Changes Pushing and Pulling Branching and Merging Best Practices for Git in a DevOps Environment Integrating...

Introduction to DevOps

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Table of Contents: Understanding DevOps Principles and Practices Key Concepts in DevOps Continuous Integration (CI) Continuous Delivery (CD) Infrastructure as Code (IaC) Monitoring and Logging Benefits of DevOps in Modern Software...

Monorepo Architecture with Nx and Turborepo for Fullstack Apps

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As applications grow in complexity, managing multiple repositories can become cumbersome and inefficient. Monorepos offer a solution by housing all projects and services in...

Building and Deploying to Docker, Heroku, and Railway in NestJS

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In modern web development, containerization and cloud deployment have become essential practices for ensuring that applications are portable, scalable, and easy to manage. In...

Linting, Formatting, and CI/CD Integration in NestJS

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In modern development workflows, maintaining clean, readable, and consistent code is essential for collaboration and long-term project sustainability. Linting and code formatting help ensure...

End-to-End Testing with @nestjs/testing

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End-to-End (E2E) testing is a critical part of testing in any application. It ensures that the entire system works together as expected, from the...

Unit and Integration Testing in NestJS

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Testing is an essential part of software development, ensuring that your application behaves as expected and preventing bugs. NestJS provides excellent tools and support...

Implementing CQRS (Command Query Responsibility Segregation) in NestJS

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CQRS (Command Query Responsibility Segregation) is a design pattern that separates the responsibility of reading data (queries) from writing data (commands). This pattern helps...
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