Your SQL Learning Path
Follow the 15-phase progression from foundations to interview mastery
Database Fundamentals
What is SQL, Database, Tables, SQL vs NoSQL, Keys, Constraints
Explore →SQL Basics
SELECT, WHERE, DISTINCT, ORDER BY, LIMIT, LIKE, IN, BETWEEN, NULL
Explore →CRUD Operations
INSERT, UPDATE (with WHERE!), DELETE
Explore →Functions & Aggregation
COUNT, SUM, AVG, MIN/MAX, GROUP BY, HAVING, WHERE vs HAVING
Explore →JOINs
INNER, LEFT, RIGHT, FULL OUTER, SELF, CROSS, Multi-table
Explore →Subqueries & CTEs
Subqueries, Second Highest Salary, CTE (WITH)
Explore →Window Functions
ROW_NUMBER, RANK, DENSE_RANK, PARTITION BY, LAG/LEAD, Running Total
Explore →Advanced SQL
Execution Order, CASE, Views, Materialized Views, Procedures
Explore →Performance
Indexes, EXPLAIN, Partitioning, Sharding
Explore →Data Modeling
Conceptual/Logical/Physical, Normalization 1NF-3NF, OLTP/OLAP, Star/Snowflake
Explore →SQL Practice Exercises
40 hands-on exercises — Basic (1-8), Intermediate (9-20), Advanced (21-40) with solutions
Explore →Interview Mastery
Beginner/Intermediate/Advanced Q&A, Framework, Decision Tree, Cheat Sheet
Explore →