DEV Community

Cover image for Complete Roadmap to learn SQL in 2025
Just Determined
Just Determined

Posted on

1

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 πŸ‘‡πŸ‘‡

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

Heroku

Simplify your DevOps and maximize your time.

Since 2007, Heroku has been the go-to platform for developers as it monitors uptime, performance, and infrastructure concerns, allowing you to focus on writing code.

Learn More

Top comments (0)

Sentry image

See why 4M developers consider Sentry, β€œnot bad.”

Fixing code doesn’t have to be the worst part of your day. Learn how Sentry can help.

Learn more

πŸ‘‹ Kindness is contagious

Discover a treasure trove of wisdom within this insightful piece, highly respected in the nurturing DEV Community enviroment. Developers, whether novice or expert, are encouraged to participate and add to our shared knowledge basin.

A simple "thank you" can illuminate someone's day. Express your appreciation in the comments section!

On DEV, sharing ideas smoothens our journey and strengthens our community ties. Learn something useful? Offering a quick thanks to the author is deeply appreciated.

Okay