SQL Interview Questions for Freshers (Free, with Live Practice)

The SQL questions Indian interviews actually ask — 2nd highest salary, find duplicates, JOINs, WHERE vs HAVING, window functions — each with a runnable in-browser example.

What you'll learn

SQL is the most-asked skill in Indian data and backend interviews, and this free course turns every classic question into a named, runnable pattern: second and Nth highest salary, finding and deleting duplicates, top-N per group with ROW_NUMBER/RANK, running totals, employees-and-managers self-joins, customers-who-never-ordered LEFT JOINs, and WHERE-vs-HAVING. Every example runs live in your browser so you practise on the spot. Part of the free SQL for Data Analysts course.

Why Techwave Academy

• All 17 courses are free on signup — no credit card, no trial, no upgrade pop-ups.
• In-browser IDE — write and run code without installing anything.
• AI mentor — 24×7 doubt clearing in plain language.
• India-first — Hindi/Hinglish narration where useful, CBSE alignment for school courses.
• Built by working software engineers — not theoreticians.

What you get on signup (₹0)

A single phone-number signup unlocks every course on the platform: AI Beginner, Python for Class 4 / 6 / 8 / 10 / 12 (CBSE 083), Git Basics, Linux Basics, Spoken English, IOI / Olympiad Prep, Foundation Bootcamp, Blind 75, NeetCode 150, Claude Mastery, and Tableau & Power BI & SQL for Data Analysts. Yes, all 17 — forever free.

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