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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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Using ORM with SQLAlchemy: Complete Beginner to Advanced Guide

Table of Contents Introduction What is an ORM and Why Use It? Introduction to SQLAlchemy Installing SQLAlchemy Setting Up a Database with SQLAlchemy Core Concepts of SQLAlchemy ORM Declarative Base Mapping Classes...

MongoDB Integration with PyMongo: Complete Beginner to Advanced Guide

Table of Contents Introduction Why MongoDB for Python Applications? What is PyMongo? Installing PyMongo Connecting to a MongoDB Database Creating Databases and Collections CRUD Operations in MongoDB using PyMongo Inserting Documents Querying Documents Updating...

PostgreSQL Integration with psycopg2 in Python: A Complete Guide

Table of Contents Introduction Why PostgreSQL for Python Applications? What is psycopg2? Installing psycopg2 Connecting to a PostgreSQL Database Creating Tables in PostgreSQL with psycopg2 Performing CRUD Operations Insert Data Read Data Update Data Delete...

SQLite with Python: Perform CRUD Operations (Complete Guide)

Table of Contents Introduction Why Use SQLite with Python? Setting Up SQLite in Python Creating a Database and Table Inserting Data (Create Operation) Retrieving Data (Read Operation) Updating Data (Update Operation) Deleting...

Introduction to Databases: Relational vs NoSQL (A Comprehensive Guide)

Table of Contents Introduction What is a Database? Why Databases Are Essential Types of Databases Relational Databases (SQL) What is a Relational Database? Features of Relational Databases Popular Relational Database Systems Strengths and...

Mastering Serialization in Python: Pickle, Shelve, and Marshal

Table of Contents Introduction What is Serialization? Why Serialization is Important Overview of Serialization Modules in Python Pickle Module What is Pickle? How to Pickle Data How to Unpickle Data Pickle Protocol Versions Security...

Mastering Context Managers for File Handling in Python

Table of Contents Introduction What are Context Managers? The Traditional Way vs Context Managers Using with Statement for File Handling How Context Managers Work Internally Creating Custom Context Managers Contextlib Module...

File Handling in Python: Text, Binary, JSON, CSV, and XML Files

Table of Contents Introduction Basics of File Handling in Python Working with Text Files Working with Binary Files Handling JSON Files Handling CSV Files Handling XML Files Best Practices in File Handling Common...

Building Plugins with Inheritance and Interfaces in Python

Table of Contents Introduction Why Use Plugins? Role of Inheritance and Interfaces in Plugin Architecture Setting Up a Plugin System: Step-by-Step Building a Basic Plugin System in Python Advanced Plugin...

SOLID Principles for Python Developers

Table of Contents Introduction What Are SOLID Principles? Why Are SOLID Principles Important? Deep Dive into Each SOLID Principle Single Responsibility Principle (SRP) Open/Closed Principle (OCP) Liskov Substitution Principle (LSP) Interface Segregation...

Design Patterns in Python (Factory, Observer, Singleton, and More)

Table of Contents Introduction What are Design Patterns? Why Use Design Patterns in Python? Categories of Design Patterns Creational Patterns Factory Pattern Singleton Pattern Structural Patterns Adapter Pattern Decorator Pattern Behavioral Patterns Observer Pattern Strategy Pattern Choosing the...

Modules, Packages, and Python Project Structure Best Practices

Table of Contents Introduction What is a Module in Python? Creating and Using Your Own Modules What is a Package in Python? Organizing Code into Packages The __init__.py File Explained Importing...