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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...

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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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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Creating REST Controllers & API Endpoints

Table of Contents Introduction What is a RESTful Web Service? Spring MVC for RESTful APIs Creating a REST Controller Mapping HTTP Methods to Controller Methods Request and Response Handling Consuming JSON...

Introduction to Spring MVC Architecture

Table of Contents Introduction What is Spring MVC? Components of Spring MVC DispatcherServlet HandlerMapping Controller ViewResolver Model Spring MVC Workflow Advantages of Using Spring MVC Setting Up a Basic Spring MVC Application Conclusion 1. Introduction Spring MVC (Model-View-Controller)...

Packaging, Running, and Building Spring Boot Apps

Table of Contents Introduction Packaging Spring Boot Applications JAR vs WAR Spring Boot Maven Plugin Spring Boot Gradle Plugin Running Spring Boot Applications Building Spring Boot Applications Customizing Build Process Dockerizing Spring Boot...

Using CommandLineRunner and ApplicationRunner in Spring Boot

Table of Contents Introduction What are CommandLineRunner and ApplicationRunner? Differences Between the Two When to Use Them Implementing CommandLineRunner Implementing ApplicationRunner Use Cases Accessing Command-Line Arguments Best Practices Conclusion 1. Introduction In Spring Boot, CommandLineRunner and...

Spring Boot DevTools & Live Reload

Table of Contents Introduction What is Spring Boot DevTools? Key Features of DevTools Setting Up Spring Boot DevTools Live Reload Explained Using Live Reload with a Browser Auto-Restart vs. Live Reload Customizing...

Profiles and Environment Setup in Spring Boot

Table of Contents Introduction to Spring Profiles Why Use Profiles? Defining Profiles Activating Profiles Profile-Specific Configuration Files Programmatic Profile Activation Conditional Beans with @Profile Default Profiles Multi-Profile Configurations Best Practices Conclusion 1. Introduction to Spring Profiles Spring...

Configuration with application.properties and application.yml in Spring Boot

Table of Contents Introduction to Spring Boot Configuration application.properties vs application.yml Default Locations and Hierarchy Common Configuration Examples Profiles and Environment-Specific Configs External Configuration Sources Accessing Configuration in Code Using @ConfigurationProperties Validating Configuration...

Component Scanning and Bean Lifecycle in Spring Boot

Table of Contents Introduction to Component Scanning Default Component Scanning Behavior Customizing Component Scanning Spring Bean Lifecycle Overview Bean Initialization and Destruction Bean Lifecycle Hooks: @PostConstruct and @PreDestroy Using InitializingBean and...

Dependency Injection in Spring Boot (Constructor, Field, Setter Injection)

Table of Contents Introduction to Dependency Injection Why Dependency Injection? Types of Dependency Injection in Spring Constructor Injection Field Injection Setter Injection Comparing the Three Types Choosing the Right Approach Common Pitfalls and...

@SpringBootApplication and Auto-Configuration in Spring Boot

Table of Contents Introduction to @SpringBootApplication Understanding What @SpringBootApplication Does Breakdown of Combined Annotations What is Auto-Configuration? How Auto-Configuration Works Disabling Auto-Configuration Customizing Auto-Configuration Common Auto-Configured Components Best Practices Conclusion 1. Introduction to @SpringBootApplication When building...

Setting Up a Spring Boot Project (Spring Initializr)

Table of Contents Overview of Spring Boot Project Setup What is Spring Initializr? Generating a Spring Boot Project with Spring Initializr Project Structure Explained Importing the Project into an...

Introduction to Spring Framework and Spring Boot

Table of Contents What is the Spring Framework? Why Use Spring? Core Concepts of Spring Framework Inversion of Control (IoC) Dependency Injection (DI) Aspect-Oriented Programming (AOP) Spring Modules Overview Spring vs Traditional...