SQL Interview Challenge: Employees Who Joined Before Their Managers

🎯 Master SQL for Real-World Scenarios and Interviews! In this video, tackle a thought-provoking SQL interview question: How to find employees who joined earlier than their managers? 🔍 What You'll Learn: ✅ How to use self-joins to query hierarchical relationships. ✅ Comparing dates to find meaningful insights. ✅ Step-by-step breakdown with table creation and sample data. 👩‍💻 Who Is This Video For? Perfect for Data Analysts, Data Engineers, Data Scientists, and anyone preparing for SQL interviews! 📌 Topics Covered: SQL Self-Joins for Hierarchical Queries Date Comparisons in SQL Optimized Query Writing Techniques 🎯 Pro Tip: Stay tuned for bonus tips on handling hierarchical data in SQL for large datasets! 🔔 Subscribe for more SQL interview scenarios tailored for all levels. #sqlserver #sqlquery #whatissql #sqldatabase #oracle #oraclesql #SQLtutorialforbeginners #learnSQLfromscratch #SQLfromzerotohero #SQLbasicstoadvanced #SQLqueries #SQLfordataanalysis #SQLjoinsexplained #SQLsubqueriestutorial #SQLaggregationfunctions #SQLinterviewquestions #SQLrealworldexamples #SQLmasterclass #SQLtutorial2024 #learnSQLfast #SQLfordatascience #SQLbeginnertoexpert drop table if exists Employee CREATE TABLE Employee ( EmpID INT, EmpName NVARCHAR(50), ManagerID INT, DateOfJoining DATE ); INSERT INTO Employee VALUES (1, 'Alice', NULL, '2020-01-15'), -- Alice is the CEO (2, 'Bob', 1, '2021-03-10'), (3, 'Charlie', 1, '2019-11-20'), -- Charlie joined before Alice (4, 'Diana', 2, '2021-06-01'), (5, 'Eve', 2, '2021-02-15'), -- Eve joined before Bob (6, 'Frank', 3, '2020-05-01'); -- Frank joined after Charlie