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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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Working with Abstract Base Classes (ABC) and Interfaces in Python

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Table of Contents Introduction What is an Abstract Base Class (ABC)? Importance of ABCs and Interfaces How to Define Abstract Base Classes in Python Abstract Methods and Concrete Methods Example...

Design Patterns in Python: Factory, Observer, Singleton, and More

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Table of Contents Introduction What are Design Patterns? Importance of Design Patterns Categorization of Design Patterns Factory Pattern in Python Singleton Pattern in Python Observer Pattern in Python Other Important Patterns in...

Composition vs Inheritance in Python: When to Use Which

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Table of Contents Introduction What is Inheritance? What is Composition? Inheritance vs Composition: Core Differences When to Use Inheritance When to Use Composition Practical Examples: Inheritance vs Composition Benefits and Drawbacks of...

Multiple Inheritance and MRO (Method Resolution Order) in Python

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Table of Contents Introduction to Multiple Inheritance How Multiple Inheritance Works in Python Potential Issues with Multiple Inheritance Understanding MRO (Method Resolution Order) The super() Function and MRO C3 Linearization...

Abstract Classes and Interfaces in Python (Using the abc Module)

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Table of Contents Introduction to Abstract Classes and Interfaces Why Use Abstract Classes? Understanding the abc Module Creating Abstract Classes Defining Abstract Methods Abstract Properties Abstract Classes vs Interfaces: Conceptual Differences Practical...

Operator Overloading (Magic/Dunder Methods) in Python

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Table of Contents Introduction to Operator Overloading What Are Magic/Dunder Methods? Why Use Operator Overloading? Common Magic Methods for Operator Overloading Practical Examples of Operator Overloading Best Practices for Operator...

Encapsulation, Properties, and Getters/Setters in Python

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Table of Contents Introduction to Encapsulation Why Encapsulation Matters Achieving Encapsulation in Python Public, Protected, and Private Attributes Properties in Python Getters and Setters Explained Using @property Decorators Practical Examples Best Practices for...

Polymorphism and Duck Typing in Python

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Table of Contents Introduction to Polymorphism Types of Polymorphism Polymorphism in Python with Examples What is Duck Typing? Duck Typing vs Traditional Typing Practical Examples of Duck Typing Best Practices for...

Inheritance, Multiple Inheritance, and MRO in Python

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Table of Contents Introduction to Inheritance Single Inheritance in Python Multiple Inheritance in Python Method Resolution Order (MRO) The super() Function and its Role in MRO Diamond Problem in Python...

Constructors, Destructors, Class Methods, and Static Methods in Python

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Table of Contents Introduction Understanding Constructors in Python The __init__ Method: The Python Constructor Destructor in Python: The __del__ Method Class Methods: Definition and Use Cases Static Methods: When to...

Classes and Objects in Python: Understanding Object-Oriented Programming

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Table of Contents Introduction to Object-Oriented Programming (OOP) What are Classes and Objects? Defining Classes in Python Creating and Instantiating Objects The __init__ Method and Constructor Instance Variables and Methods Class...

Monkey Patching and Dynamic Class Modification in Python

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Table of Contents Introduction to Monkey Patching What is Monkey Patching? Why and When to Use Monkey Patching How Monkey Patching Works in Python Example of Monkey Patching: Modifying...
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