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SQL for Financial Analytics: Profit & Loss Reporting, Forecasting, and Ratio Analysis

Table of Contents Introduction Importance of SQL in Financial Analysis Core Financial Statements in Data Tables Building a Profit & Loss (P&L) Report in SQL Structuring Accounts: Revenue vs...
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Data Warehousing Concepts in SQL: Understanding Star and Snowflake Schemas

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SQL with APIs and JSON Fields in PostgreSQL: Working with Semi-Structured Data

Table of Contents Introduction Why JSON Support Matters in Modern SQL PostgreSQL JSON vs JSONB Creating Tables with JSON Fields Inserting JSON Data (from APIs or files) Accessing JSON Properties...
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SQL for Data Engineering: ETL Concepts and Building Scalable Data Pipelines

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Working with JSON in SQL: Storing, Querying, and Manipulating JSON Data

Table of Contents Introduction Why Use JSON in SQL Databases? Storing JSON Data in Tables JSON Data Types and Columns Basic JSON Syntax Inserting JSON Values Retrieving JSON Data Accessing JSON Fields...

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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...

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...

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Linting and Formatting: ESLint + Prettier for TypeScript

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Table of Contents Introduction Why Linting and Formatting Are Critical What is ESLint? What is Prettier? How ESLint and Prettier Work Together Setting Up ESLint in a TypeScript Project Installing Dependencies Configuring...

Clean Code Principles and Best Practices for TypeScript

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Table of Contents Introduction Why Clean Code Matters Core Clean Code Principles Meaningful Names Small, Focused Functions Single Responsibility Principle (SRP) Avoiding Side Effects Favor Composition Over Inheritance DRY (Don’t Repeat Yourself) KISS (Keep...

Event-Driven Programming with Typed Events in TypeScript

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Table of Contents Introduction What is Event-Driven Programming (EDP)? Why Typed Events Matter Building a Simple Event System in TypeScript Defining Typed Event Interfaces Creating an Event Emitter Class Subscribing, Emitting,...

Domain-Driven Design (DDD) Basics in TypeScript

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Table of Contents Introduction What is Domain-Driven Design (DDD)? Core Concepts of DDD Entities Value Objects Aggregates Repositories Services Structuring a DDD Project in TypeScript Example: Building a Simple DDD Module in TypeScript Best Practices...

Applying SOLID Principles with TypeScript

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Table of Contents Introduction What are the SOLID Principles? S - Single Responsibility Principle (SRP) O - Open/Closed Principle (OCP) L - Liskov Substitution Principle (LSP) I - Interface Segregation...

Dependency Injection (DI) in TypeScript Projects

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Table of Contents Introduction What is Dependency Injection (DI)? Benefits of Dependency Injection Types of Dependency Injection Implementing DI in TypeScript Manual DI Using DI Frameworks (InversifyJS) Best Practices for Dependency Injection...

Advanced Patterns: Repository, Service, Controller Layers in TypeScript

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Table of Contents Introduction Why Use Layered Architecture? Layer 1: The Repository Layer What is the Repository Pattern? Repository Layer in TypeScript Example of Repository Pattern Layer 2: The Service Layer What...

Connecting a Frontend Framework (React) with TypeScript

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Table of Contents Introduction Prerequisites Step 1: Set Up a New React Project with TypeScript Step 2: Install Required Dependencies Step 3: Set Up Folder Structure Step 4: Create Functional...

Building a REST API with Express and TypeScript

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Table of Contents Introduction Prerequisites Step 1: Initialize a New Node.js Project Step 2: Install Dependencies Step 3: Setting Up TypeScript Step 4: Setting Up Express Step 5: Create Routes and...

Setting Up a Node.js Project with TypeScript

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Table of Contents Introduction Prerequisites Step 1: Install Node.js and npm Step 2: Initialize a New Node.js Project Step 3: Install TypeScript and Other Dependencies Step 4: Configure TypeScript with...

Namespaces vs Modules: Old vs Modern Approaches in TypeScript

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Table of Contents Introduction What Are Namespaces in TypeScript? What Are Modules in TypeScript? Differences Between Namespaces and Modules Advantages and Disadvantages of Namespaces Advantages and Disadvantages of Modules Best Practices...

Module Resolution: ESModules vs CommonJS in TypeScript

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Table of Contents Introduction What is Module Resolution? CommonJS Modules ESModules (ESM) Module Resolution in TypeScript TypeScript Module Resolution Process Module Resolution Strategies ESModules vs CommonJS in TypeScript Syntax Differences Import/Export Compatibility Default Exports Interoperability Between...
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