In this video, you will learn SELF JOIN in SQL Server, one of the most commonly asked SQL interview questions.
Complete playlist is here: https://www.youtube.com/playlist?list=PLKFKd7UiwVxMiV9Cy7gaF8A_ylx4FuFA9
A self join is used when a table needs to be joined with itself, typically for hierarchical or relational data like Employee–Manager, Category–Subcategory, or Parent–Child relationships.
This video explains the concept using simple, real-world examples and interview-friendly explanations.
✅ What You Will Learn
What is a Self Join in SQL Server?
Why Self Join is required
Employee–Manager example
How table aliases work in Self Join
Handling NULL values
Common interview questions & mistakes
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