System Design Interview

Databases

Choose the right database for the job. Compare SQL and NoSQL, and understand the trade-offs between consistency, availability, and partition tolerance.

Example: SQL Query for User Data

A simple SQL query to retrieve user information. This demonstrates the structured nature of SQL databases.


                                SELECT id, username, email
                                FROM users
                                WHERE signup_date > '2023-01-01';

Our AI Coach can help you practice writing complex SQL queries, discuss database schema design, and explore NoSQL alternatives for different use cases.