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Complete Roadmap to learn SQL in 2025

  1. Basic Concepts

    • Understand databases and SQL.
    • Learn data types (INT, VARCHAR, DATE, etc.).
  2. Basic Queries

    • SELECT: Retrieve data.
    • WHERE: Filter results.
    • ORDER BY: Sort results.
    • LIMIT: Restrict results.
  3. Aggregate Functions

    • COUNT, SUM, AVG, MAX, MIN.
    • Use GROUP BY to group results.
  4. Joins

    • INNER JOIN: Combine rows from two tables based on a condition.
    • LEFT JOIN: Include all rows from the left table.
    • RIGHT JOIN: Include all rows from the right table.
    • FULL OUTER JOIN: Include all rows from both tables.
  5. Subqueries

    • Use nested queries for complex data retrieval.
  6. Data Manipulation

    • INSERT: Add new records.
    • UPDATE: Modify existing records.
    • DELETE: Remove records.
  7. Schema Management

    • CREATE TABLE: Define new tables.
    • ALTER TABLE: Modify existing tables.
    • DROP TABLE: Remove tables.
  8. Indexes

    • Understand how to create and use indexes to optimize queries.
  9. Views

    • Create and manage views for simplified data access.
  10. Transactions

    • Learn about COMMIT and ROLLBACK for data integrity.
  11. Advanced Topics

    • Stored Procedures: Automate complex tasks.
    • Triggers: Execute actions automatically based on events.
    • Normalization: Understand database design principles.
  12. Practice

    • Use platforms like LeetCode, HackerRank, or learnsql for hands-on practice.

Here are some free resources to learn  & practice SQL 👇👇

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

Udacity free course- https://techurl.in/tYrRG

For Practice- https://stratascratch.com/?via=free

SQL in 30 Days: https://t.me/SQLResourcesTP/6

Top 10 SQL Projects with Datasets: https://t.me/DataScienceResourcesTP/5

Join for more free resources: https://t.me/TechPsyche

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