✅ Complete Roadmap to Mastering SQL 🚀 🗄️

📂 1. SQL Fundamentals
– What is a database & DBMS
– Basic Syntax: SELECT, FROM, WHERE
– Data Types: INT, VARCHAR, DATE, etc.
– Operators: =, >, <, LIKE, IN
– Aliases & Comments

📂 2. Filtering & Sorting
– WHERE Clause: Advanced conditions
– ORDER BY: Sorting results
– LIMIT: Restricting rows
– DISTINCT: Unique values

📂 3. Aggregate Functions
– COUNT(), SUM(), AVG(), MIN(), MAX()
– GROUP BY: Grouping data
– HAVING: Filtering grouped data

📂 4. Joins & Relationships
– INNER JOIN: Matching rows
– LEFT/RIGHT JOIN: All rows from one table
– FULL OUTER JOIN: All rows from both tables
– Self Join: Joining a table to itself
– Subqueries: Queries within queries

📂 5. Advanced Filtering
– IN, BETWEEN, LIKE operators
– NULL values: IS NULL, IS NOT NULL
– EXISTS operator

📂 6. Subqueries & CTEs
– Subqueries in SELECT, FROM, WHERE
– Common Table Expressions (CTEs): Reusable queries

📂 7. Window Functions
– RANK(), DENSE_RANK(), ROW_NUMBER()
– LAG(), LEAD()
– OVER() clause: Defining the window
– Partitioning: PARTITION BY

📂 8. Data Manipulation
– INSERT: Adding new data
– UPDATE: Modifying existing data
– DELETE: Removing data
– MERGE: Combining data (upsert)

📂 9. Database Design
– Normalization: Reducing redundancy
– Primary & Foreign Keys: Relationships
– Data types & Constraints
– Indexing: Improving query performance

📂 10. Advanced Topics
– Stored Procedures: Precompiled SQL
– Triggers: Automatic actions
– Views: Virtual tables
– Performance Tuning: Optimizing queries
– Security: User permissions

📂 11. Practice & Projects
– Solve coding challenges on platforms like *LeetCode, HackerRank*
– Work on real-world projects using datasets from *Kaggle, Data.gov*
– Build a portfolio to showcase your SQL skills

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