Question 1

What is the SQL Mastery course about?

Accepted Answer

SQL Mastery is an advanced SQL course covering CASE statements, NULL handling (COALESCE, NULLIF), data transformation functions (string, date, numeric), subqueries, CTEs, and window functions. It's designed for data professionals who already know SQL basics and want to master advanced techniques used in real-world data analysis and FAANG interviews.

Question 2

What are the prerequisites for SQL Mastery?

Accepted Answer

You should complete the SQL Fundamentals course first or have equivalent knowledge of SELECT, WHERE, GROUP BY, and JOINs. SQL Mastery builds on these foundations to teach advanced concepts.

Question 3

Does this course cover SQL window functions?

Accepted Answer

Yes! Module 4 provides comprehensive coverage of window functions including ROW_NUMBER, RANK, DENSE_RANK, NTILE, PARTITION BY, running totals, moving averages, LAG/LEAD, and frame specifications. These are the #1 advanced SQL topic in FAANG interviews.

Question 4

Will this help with FAANG data science interviews?

Accepted Answer

Absolutely! The course content is based on research from DataLemur, StrataScratch, and other interview prep platforms. We cover patterns like conditional aggregation, top-N per group, running calculations, and existence checks that appear frequently in technical interviews.

Question 5

What are CTEs and why should I learn them?

Accepted Answer

CTEs (Common Table Expressions) are named temporary result sets that make complex queries readable and maintainable. They're covered in Module 3 and are essential for professional SQL work. CTEs help you break down complex logic into understandable steps.

Question 6

How long does the SQL Mastery course take?

Accepted Answer

The complete SQL Mastery course takes approximately 5-6 hours to complete across 4 modules: Conditional Logic (75 min), Data Transformation (90 min), Subqueries & CTEs (75 min), and Window Functions (90 min). Learn at your own pace with saved progress.

SQL Mastery
Advanced Query Techniques.

Course Overview

Learning Modules

Conditional Logic & NULL Handling

Sections

Data Transformation Functions

Sections

Subqueries & CTEs

Sections

Window Functions

Sections

SQL MasteryAdvanced Query Techniques.

Course Overview

Learning Modules

Conditional Logic & NULL Handling

Sections

Data Transformation Functions

Sections

Subqueries & CTEs

Sections

Window Functions

Sections

SQL Mastery
Advanced Query Techniques.