Data Analytics Tutorial Series 2025 | Full Course for Beginners - Data Analytics Tutorial #29 Self Join in SQL Explained | Employee–Manager Hierarchy #dataanalyst

=========== Register here and get a call from sharpener tech https://www.sharpener.tech/?utm_source=codestepbystep&utm_medium=youtube&utm_campaign=DAplaylist&utm_term=introtoDAcourse =================== This course is created by Team Sharpener. Sharpener is India’s #1 Training Institute, and in just 5 years, they’ve helped 4000+ students get a job. This entire course is taught by Kaustubh Bhatter, CEO of Sharpener Welcome back to the Data Analytics Tutorial Playlist! This is Episode 29. In this video, we deep dive into a very interesting and practical SQL concept — Self Join. You’ll learn how to handle hierarchical data (like Employee–Manager relationships) when everything exists in the same table. This real-world scenario comes from a backend developer’s experience where HR needed employee-manager reports, but all data was stored in a single employee table. To solve this, we used Self Join + Left Join to build a clean and efficient report. What You Will Learn Today What is a Self Join Why and when to use Self Join Employee–Manager relationship example How to join a table with itself Using aliases (E1 & E2) for clarity Why LEFT JOIN is required in hierarchical data How to handle employees with no managers (NULL values) Real-world SQL reporting example Self Join Concept SQL Joins Use Case Employee Table Structure Manager ID Mapping Hierarchical Data Queries SQL Query Optimization for Reports self join sql, sql self join example, employee manager relationship sql, hierarchical data sql, sql joins tutorial, data analytics tutorial 2026, sql left join example, sql join same table, sql real world examples, sql reporting queries, employee table sql, manager id sql, sql tutorial for beginners, data analyst playlist, sql advanced joins ============================ Our website : https://thecodingskills.com