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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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Django Advanced: Middleware, Signals, and Caching Explained

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Table of Contents Introduction Django Middleware What is Middleware Built-in Middleware in Django Creating Custom Middleware Best Practices for Middleware Django Signals What are Signals Common Use Cases Connecting and Sending Signals Built-in Django Signals Caching...

Django Basics: Understanding the MTV Pattern and ORM

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Table of Contents Introduction to Django Why Choose Django for Web Development The MTV Architecture in Django Model Template View Django ORM (Object-Relational Mapping) Introduction to ORM How Django ORM Works Querying the Database...

Using Celery for Asynchronous Task Queues in Python

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Table of Contents Introduction to Asynchronous Tasks What is Celery? Core Concepts in Celery Setting Up Celery Example: Basic Celery Task Running Celery Workers and Sending Tasks Celery with Flask Integration Celery...

WebSocket Basics and Real-time Apps with FastAPI

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Table of Contents Introduction to Real-time Communication What are WebSockets? HTTP vs WebSocket: Key Differences How WebSockets Work Introduction to FastAPI and WebSocket Support Setting Up FastAPI with WebSockets Example: Basic...

Session Management, Cookies, and Building Secure Web Apps in Python

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Table of Contents Introduction to Sessions and Cookies What is a Session? What are Cookies? Sessions vs Cookies: Key Differences Managing Sessions in Flask Secure Cookie Handling Best Practices Common Session...

OAuth and JWT Authentication Basics in Python APIs

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Table of Contents Introduction to Authentication What is OAuth? OAuth 2.0 Core Concepts OAuth 2.0 Grant Types What is JWT (JSON Web Token)? JWT Structure Explained How OAuth and JWT Work...

Introduction to FastAPI (Modern APIs in Python)

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Table of Contents Introduction to FastAPI Why Choose FastAPI? Core Features of FastAPI Prerequisites for Learning FastAPI Installing FastAPI and Uvicorn Your First FastAPI Application Understanding Request Handling in FastAPI Auto-Documentation with...

Building REST APIs with Flask: A Step-by-Step Guide

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Table of Contents Introduction to REST APIs What is Flask? Why Use Flask for Building REST APIs? Setting Up Flask for REST API Development Creating Your First API Endpoint HTTP...

Jinja2 Templating in Flask: A Comprehensive Guide

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Table of Contents Introduction to Jinja2 What is Templating in Flask? Why Use Jinja2 in Flask? Setting Up Jinja2 with Flask Basic Syntax of Jinja2 Using Variables in Templates Control Structures...

Introduction to Flask and Building Your First Web Application

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Table of Contents Introduction What is Flask? Why Choose Flask? Setting Up the Environment Installing Flask Your First Flask Web Application Understanding the Code Running and Testing Your Flask App Common Errors and...

Data Integrity, Transactions, and Connection Pooling in Python

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Table of Contents Introduction What is Data Integrity? Ensuring Data Integrity in Python Applications What are Database Transactions? ACID Properties Using Transactions in Python (SQLite, PostgreSQL) Connection Pooling Why is Connection Pooling...

Building Mini-Applications Using Databases: A Complete Guide for Python Developers

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Table of Contents Introduction Why Build Mini-Applications? Setting Up the Environment Project 1: Simple To-Do List App (SQLite) Project Structure Database Schema CRUD Operations Sample Code Project 2: Contact Manager App (PostgreSQL) Project Structure Database...
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