SQL Interview Question Most Beginners Solve Wrong

Many beginners solve this SQL interview question using two queries and a UNION.
But an experienced SQL developer solves it using a single WHERE condition.

In this short video, you will learn:

• How beginners approach this SQL problem
• Why the UNION approach is not efficient
• How experts write a cleaner and faster SQL query
• How small logic changes can improve SQL performance

If you are preparing for SQL interviews or learning data analysis with SQL, understanding this type of thinking is very important.

Want to learn SQL the practical way?

I run Live SQL Training where we focus on:

• Writing real SQL queries
• Solving interview-style problems
• Building strong SQL fundamentals
• Practicing real-world data analysis scenarios

The next batch starts next Monday.
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Видео SQL Interview Question Most Beginners Solve Wrong канала Manish Sharma