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Courses

Mastering SQL

Welcome to Mastering SQL: From Data Retrieval to High-Performance Engineering. This course is designed to take you from absolute beginner to advanced proficiency, focusing on the mental models and technical skills required to excel in modern data environments.

Course Philosophy

Section titled “Course Philosophy”

SQL (Structured Query Language) is not just a tool; it’s a way of thinking. While most programming languages are imperative (telling the computer how to do something), SQL is declarative (telling the computer what you want). This course emphasizes “Thinking in Sets,” transitioning you from step-by-step logic to set-based operations.

What You Will Learn

Section titled “What You Will Learn”

Foundations

Master the relational model, the “Big 6” clauses, and basic data retrieval.

Data Transformation

Learn to clean, reshape, and transform raw data using advanced functions.

Complex Analytics

Harness the power of Window Functions, CTEs, and complex Joins.

Performance

Write queries that scale. Understand indexing, execution plans, and optimization.

Course Roadmap

Section titled “Course Roadmap”

  1. Foundations and Mental Models Understand the relational model and master basic data retrieval without being overwhelmed by syntax.

  2. Shaping and Transforming Data Manipulate raw data into usable formats using scalar functions and conditional logic.

  3. Aggregation and Grouping Move from detailed rows to summary statistics using GROUP BY and aggregate functions.

  4. Multi-Table Systems (JOINs and Sets) Combine disparate data sources using various JOIN types and set operators.

  5. Advanced Query Logic (Subqueries & CTEs) Write modular, readable, and complex logic using Subqueries and Common Table Expressions.

  6. Window Functions Perform calculations across related rows without collapsing them—the “Game Changer” for SQL developers.

  7. Database Design and Integrity (DDL/DML) Learn to create, modify, and protect the data structure using schemas and constraints.

  8. Performance Tuning and Optimization Write queries that scale and don’t crash the server by understanding the engine’s internals.

  9. Specialized & Modern Topics Handle JSON data, solve complex “Gaps and Islands” problems, and understand dialect differences.

  10. Applied Projects Synthesize your skills through real-world scenarios and investigative pedagogy.