5 articles
You don't need to install MySQL to learn SQL. Here's how to practise queries against a real database that runs in your browser tab — and a study order that actually sticks.
Joins are where most SQL learners stall. Here's each join type explained by what it does to your row count, the traps that silently break queries, and how to debug a join that returns too many rows.
The SQL questions that actually come up in campus and fresher interviews — with the answers interviewers are listening for, and the follow-ups that separate memorised answers from real understanding.
Normalization, explained by fixing one broken table step by step — what each normal form actually prevents, and when experienced teams deliberately break the rules.
How an index actually works, why adding one sometimes changes nothing, and the handful of query rewrites that turn a slow report into a fast one.
