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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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Sorting Results with ORDER BY in SQL

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Table of Contents Introduction What is the ORDER BY Clause? Basic Syntax of ORDER BY Sorting in Ascending Order (ASC) Sorting in Descending Order (DESC) Default Sorting Behavior Sorting by Multiple...

Logical Operators in SQL: AND, OR, NOT

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Table of Contents Introduction What Are Logical Operators in SQL? The Role of Logical Operators in Filtering Basic Syntax and Usage Using AND to Combine Conditions Using OR to Widen...

Using the WHERE Clause for Filtering

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Table of Contents Introduction What is the WHERE Clause? Basic Syntax of WHERE Filtering with Equality Conditions Using !=, <>, and NOT Greater Than and Less Than Comparisons Filtering Text with...

Introduction to the SELECT Statement

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Table of Contents Introduction What is the SELECT Statement? Basic Syntax of SELECT Selecting All Columns with * Selecting Specific Columns Using Aliases with AS Selecting Distinct Records Filtering Results with WHERE Logical...

Basic Data Types in SQL

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Table of Contents Introduction Why Data Types Matter in SQL Overview of SQL Data Type Categories Integer Types Decimal and Floating-Point Types Character and String Types Date and Time Types Boolean Type Binary...

Creating Your First Database and Table

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Table of Contents Introduction What is a Database in SQL? What is a Table in SQL? Syntax of CREATE DATABASE Creating a Database in SQLite Creating a Database in MySQL Creating...

Setting Up Your SQL Environment (SQLite, MySQL, PostgreSQL)

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Table of Contents Introduction Choosing the Right SQL Database for Learning Overview of SQLite Installing SQLite Using SQLite Command Line Interface GUI Tools for SQLite Overview of MySQL Installing MySQL on Windows/macOS/Linux Accessing...

Overview of SQL Syntax and Structure

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Table of Contents Introduction SQL Syntax: The Basics SQL Keywords and Case Sensitivity The Structure of a SQL Statement Understanding Clauses in SQL Writing Your First SQL Statement The SELECT Statement Using...

SQL vs NoSQL: When to Use What

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Table of Contents Introduction to Data Storage Paradigms The Rise of SQL and NoSQL What is SQL? Key Characteristics of SQL Databases What is NoSQL? The Four Major Types of...

Understanding Relational Databases

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Table of Contents What is a Relational Database? History and Evolution Core Concepts of Relational Databases Tables Rows and Columns Primary Keys Foreign Keys Relationships Between Tables Advantages of Relational Databases Limitations of Relational...

Introduction to Databases

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Table of Contents What is a Database? Why Use Databases? Types of Databases Components of a Database System Database Management Systems (DBMS) Relational vs Non-Relational Databases Real-World Applications of Databases Summary 1. What...

Mastering TypeScript Documentation and Knowledge Sharing

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Table of Contents Introduction to Effective Documentation in TypeScript Benefits of Well-Documented TypeScript Code Types of Documentation in TypeScript Projects Best Practices for Documenting TypeScript Code Tools for Generating...
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