Crack Your Data Interview – Top 20 SQL Questions

Want to crack your next data interview? 🚀
If you’re preparing for a Data Analyst, Data Engineer, or BI (Business Intelligence) role, there’s one skill you simply can’t ignore — SQL.

SQL isn’t just a nice-to-have skill. It’s the backbone of almost every data role, and interviewers know it. That’s why most SQL interview questions are built around the same core concepts — the ones you must master to stand out.

𝐏𝐚𝐲 𝐀𝐟𝐭𝐞𝐫 𝐏𝐥𝐚𝐜𝐞𝐦𝐞𝐧𝐭 𝐓𝐫𝐚𝐢𝐧𝐢𝐧𝐠 𝐏𝐫𝐨𝐠𝐫𝐚𝐦- 𝐆𝐞𝐭 𝐏𝐥𝐚𝐜𝐞𝐝 𝐈𝐧 𝐓𝐨𝐩 𝐌𝐍𝐂'𝐬

The good news? Once you learn these, you’ll walk into your interview confident and ready.

In this guide, we’re sharing 20 SQL interview questions that keep coming up over and over again. These cover essential topics such as:

Writing efficient SELECT queries
Handling INNER, LEFT, RIGHT, and FULL joins
Using aggregate functions like COUNT, SUM, and AVG
Applying GROUP BY and HAVING for grouped data analysis
Mastering subqueries and CTEs (Common Table Expressions)
Understanding window functions for advanced analytics
Filtering data using WHERE and CASE statements
Optimizing queries for performance and scalability

These aren’t just theory-based — they’re real questions asked in top company interviews, from startups to Fortune 500 firms.

Here’s the best part — we’ve compiled the full list of these 20 high-impact SQL questions in one place for you. You can use them to:

✅ Test your current skills
✅ Identify your weak spots
✅ Practice writing and optimizing queries before the big day

💼 If you want to go from nervous to confident in your SQL interview, start here:
👉 Click here to view the full list of 20 SQL interview questions

Remember, interviews aren’t about memorizing — they’re about solving problems under pressure. Learn these questions, practice daily, and you’ll be ready to tackle anything your interviewer throws at you.

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