SQLMaster
Structured Learning Path

Go from zero to interview-ready.

Our curriculum is designed to teach you SQL exactly how it's tested in technical interviews. Every lesson includes interactive, browser-based sandbox exercises to reinforce your learning instantly.

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Syllabus

Explore all 40 lessons across 8 modules.

M1 SQL Foundations

The absolute basics of querying data.

1
What is SQL & Databases?
2
SELECT basics
3
WHERE filtering
4
ORDER BY & LIMIT
5
DISTINCT & aliases
6
Practice lab: basic queries

M2 Filtering & Functions

Refining results and calculating aggregates.

1
AND / OR / NOT
2
LIKE & wildcards
3
NULL handling (IS NULL, COALESCE)
4
Aggregate functions (COUNT, SUM, AVG, MIN, MAX)
5
GROUP BY & HAVING
6
Practice lab: aggregate queries

M3 Joins

Combining data from multiple tables.

1
Understanding relationships
2
INNER JOIN
3
LEFT / RIGHT JOIN
4
FULL OUTER JOIN
5
Self joins
6
Practice lab: multi-table queries

M4 Subqueries & CTEs

Writing nested and modular queries.

1
Subqueries in WHERE
2
Subqueries in FROM
3
Correlated subqueries
4
WITH (Common Table Expressions)
5
Practice lab: complex queries

M5 Data Modification

Changing data in the database.

1
INSERT
2
UPDATE
3
DELETE
4
Practice lab: DML operations

M6 Table Design

Creating and managing database schemas.

1
CREATE TABLE & data types
2
PRIMARY KEY & FOREIGN KEY
3
UNIQUE & NOT NULL constraints
4
Indexes
5
Normalization basics

M7 Window Functions

Advanced analytics over partitions of data.

1
OVER() clause basics
2
ROW_NUMBER, RANK, DENSE_RANK
3
LAG & LEAD
4
Practice lab: window functions

M8 Advanced SQL

Logic, parsing, and performance tuning.

1
CASE WHEN
2
String & date functions
3
Performance basics (EXPLAIN)
4
Practice lab: real-world scenarios

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