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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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Mapped Types: Creating New Types Dynamically

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Table of Contents Introduction What Are Mapped Types? Basic Syntax of Mapped Types Common Use Cases of Mapped Types Creating Read-Only and Writable Types Using Mapped Types with keyof and...

Conditional Types: Extends, Infer, and Distributive Conditions

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Table of Contents Introduction What Are Conditional Types in TypeScript? Basic Syntax of Conditional Types Understanding extends in Conditional Types The infer Keyword in Conditional Types Distributive Conditional Types Practical Examples Example...

Using keyof, typeof, and Lookup Types with Generics

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Table of Contents Introduction What Are keyof, typeof, and Lookup Types? Why Use keyof, typeof, and Lookup Types with Generics? Understanding keyof with Generics Using typeof with Generics Lookup Types...

Constraints on Generics

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Table of Contents Introduction What Are Constraints on Generics? Why Use Constraints? How to Define Constraints on Generics Using extends for Constraints Constraints with Interfaces and Types Multiple Constraints with & Example...

Generic Interfaces and Classes

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Table of Contents Introduction What Are Generic Interfaces? Defining a Generic Interface Using Generic Interfaces with Different Types Generic Classes in TypeScript Defining a Generic Class Using Generic Classes with Multiple...

Generic Functions: Flexibility in Parameters

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Table of Contents Introduction What Are Generic Functions? Benefits of Generic Functions Syntax of Generic Functions Using Generic Functions with Multiple Parameters Constraints in Generic Functions Example 1: Swapping Two Values Example...

Introduction to Generics in TypeScript

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Table of Contents Introduction What Are Generics? Why Use Generics? Basic Syntax of Generics Generic Function Generic Class Working with Multiple Type Parameters Constraints in Generics Using Generics with Interfaces Use Cases for Generics Example...

Getters and Setters in TypeScript Classes

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Table of Contents Introduction What Are Getters and Setters? Defining Getters and Setters in TypeScript Accessing Getters and Setters Benefits of Using Getters and Setters Use Cases for Getters and...

Static Methods and Properties Explained in TypeScript

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Table of Contents Introduction What Are Static Methods and Properties? Defining Static Methods and Properties Accessing Static Methods and Properties Static vs Instance Methods and Properties Use Cases for Static...

Abstract Classes and Interface Implementation in TypeScript

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Table of Contents Introduction What is an Abstract Class? Defining an Abstract Class Abstract Methods in TypeScript When to Use Abstract Classes What is an Interface? Defining an Interface Implementing an Interface When...

Composition over Inheritance in TypeScript

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Table of Contents Introduction Understanding Inheritance and Composition Why Prefer Composition Over Inheritance? Composition in TypeScript Using Interfaces and Classes for Composition Composition Example: Combining Behaviors Benefits of Composition When to Use...

Inheritance and Class Hierarchies in TypeScript

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Table of Contents Introduction What is Inheritance in TypeScript? Single Inheritance in TypeScript Extending Classes Overriding Methods The super Keyword in Inheritance Multiple Inheritance (Simulated through Interfaces) Class Hierarchies: Building Relationships Between...
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