Learn SQL in 30 Days

Week 1: Beginner Level

Day 1-3: Introduction and Setup

1. Day 1: Introduction to SQL, its importance, and various database systems.
2. Day 2: Installing a SQL database (e.g., MySQL, PostgreSQL).
3. Day 3: Setting up a sample database and practicing basic commands.

Day 4-7: Basic SQL Queries

1. Day 4: SELECT statement, retrieving data from a single table.
2. Day 5: WHERE clause and filtering data.
3. Day 6: Sorting data with ORDER BY.
4. Day 7: Aggregating data with GROUP BY and using aggregate functions (COUNT, SUM, AVG).

Week 2-3: Intermediate Level

Day 8-14: Working with Multiple Tables

1. Day 8: Introduction to JOIN operations.
2. Day 9: INNER JOIN and LEFT JOIN.
3. Day 10: RIGHT JOIN and FULL JOIN.
4. Day 11: Subqueries and correlated subqueries.
5. Day 12: Creating and modifying tables with CREATE, ALTER, and DROP.
6. Day 13: INSERT, UPDATE, and DELETE statements.
7. Day 14: Understanding indexes and optimizing queries.

Day 15-21: Data Manipulation

1. Day 15: CASE statements for conditional logic.
2. Day 16: Using UNION and UNION ALL.
3. Day 17: Data type conversions (CAST and CONVERT).
4. Day 18: Working with date and time functions.
5. Day 19: String manipulation functions.
6. Day 20: Error handling with TRY...CATCH.
7. Day 21: Practice complex queries and data manipulation tasks.

Week 4: Advanced Level

Day 22-28: Advanced Topics

1. Day 22: Working with Views.
2. Day 23: Stored Procedures and Functions.
3. Day 24: Triggers and transactions.
4. Day 25: Security and user privileges.
5. Day 26: Performance tuning and query optimization.
6. Day 27: Introduction to NoSQL databases (optional).
7. Day 28: Working with NoSQL databases (optional).

Day 29-30: Real-World Applications

1. Day 29: Building a simple application that uses SQL.
2. Day 30: Final review and practice, explore advanced topics in depth, or work on a personal project.

Remember to practice regularly, work on small projects, and use online resources and SQL platforms for hands-on experience. Adjust the plan based on your progress and interests, and you'll be well on your way to becoming proficient in SQL!

SQL Resources: https://t.me/SQLResourcesTP

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