37 SQL Server Union Vs Union All and Working with Nulls

#goonlinetraining #bhaskarjogischool SQL Server Case Studies Drive Link: https://drive.google.com/drive/folders/13sT0M2djfcYSxYNCRlmsaacJNXZr19hz?usp=sharing 🚀 60 Days SQL Series | Day 37 📘 Topic: UNION vs UNION ALL & Working with NULLs Welcome to Day 37 of our 60 Days SQL Learning Series! 🔥 Have you ever worked with multiple datasets and wondered how to combine them efficiently? 🤔 Or struggled with handling missing values in your data? 👉 That’s exactly where UNION, UNION ALL, and NULL handling become essential! In real-world data analysis, combining data from different sources and dealing with NULL values is a daily task for Data Analysts & Data Scientists. 📚 In this video, you will learn: * What is the UNION operator in SQL * Difference between UNION vs UNION ALL * Removing duplicates vs keeping all records * Performance difference between UNION & UNION ALL * What are NULL values in SQL * How NULL behaves in comparisons * Using IS NULL & IS NOT NULL * Handling NULLs with functions like COALESCE / IFNULL * Real-time examples & interview-based questions * Common mistakes to avoid 💡 By the end of this video: You’ll be able to combine multiple datasets efficiently and handle missing values like a pro 🚀 🎯 60 Days SQL Learning Challenge 1️⃣ Watch the complete video 2️⃣ Take notes of key concepts 3️⃣ Practice with real-time datasets 4️⃣ Share your learning on LinkedIn & tag Go Online Trainings 🎁 Rewards for consistent learners: * Free SQL Learning Materials * SQL & Power BI Case Studies * 1:1 Career Guidance * Resume Building Support * Completion Certificate * Bonus surprises 🎉 💬 Your Turn! 👉 What is the difference between UNION and UNION ALL? 👉 How do you handle NULL values in real-time datasets? Drop your answers in the comments 👇 🔔 Don’t forget to Like, Share & Subscribe Turn on notifications 🔔 so you never miss a day in this series! 📌 Bonus Tip: Use UNION ALL when performance matters and duplicates are acceptable. Use UNION when you need clean, unique results.