Top 15 SQL Server Interview Questions | Popular SQL Queries for Interviews

Are you preparing for a technical interview or simply looking to strengthen your SQL skills? This video is packed with real-world SQL scenarios based interview questions that are frequently asked in interviews, along with clear explanations and solutions.

📌 What you'll learn in this video:
✅ How to retrieve the second-highest and third-highest salaries in SQL Server
✅ Queries to find duplicate records and delete them
✅ Joining tables to fetch meaningful data, like department names and employee salaries
✅ Fetching customers without orders, alternate rows, and employees with more than 5 years of experience
✅ Real-world aggregation queries like finding the highest revenue product and department with the most employees
✅ Practical use of SQL Server features like ROW_NUMBER(), TOP, LEFT JOIN, GROUP BY, and NOT EXISTS

💡 Whether you're a beginner or an advanced learner, mastering these queries will give you the confidence to tackle SQL interview questions and handle complex database problems with ease.

📂 Queries covered in this video:
1️⃣ Retrieve the second-highest salary of an employee
2️⃣ Get employees with the lowest and highest salary in each department
3️⃣ Find duplicate records in a table
4️⃣ Fetch the third-highest salary in a table
5️⃣ Display the lowest and highest salary records from a table
6️⃣ Find the department with the highest number of employees
7️⃣ Count employees in each department
8️⃣ Fetch employees with the highest salary in each department
9️⃣ Display employees who’ve been in the company for more than 5 years
🔟 Find employees with the same salary
... and much more!
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🎬 Chapters
00:00 - Introduction to the Video
00:45 - Query 1: How to retrieve the second-highest salary of an employee?
01:21 - Query 2: Get the employees with the lowest and highest salary for each department.
02:00- Query 3: Write a query to find all duplicate records in a table.
02:25- Query 4: Find the third-highest salary of an employee.
03:22- Query 5: Display the lowest and highest salary record from the Employee table.
03:40 - Query 6: How to find the department with the highest number of employees?
04:00- Query 7: How to get the count of employees in each department?
04:26- Query 8: Write a query to fetch employees having the highest salary in each department.
05:00- Query 9: How to display all employees who have been in the company for more than 5 years?
05:30- Query 10: Write a query to fetch the details of employees with the same salary.
06:00- Query 11: Display alternate records in SQL (odd/even rows).
06:30- Query 12: How do you find all employees who are also managers?
07:00- Query 13: Write a query to find customers who haven’t placed any orders yet.
07:30 - Query 14: Find the most profitable product in the sales table.
08:00 - Query 15: How to delete duplicate records from a table?

📈 Master SQL for your next interview and land your dream job! Let me know in the comments which query you found most useful.

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