AWS DATA ENGINEERING - 22. Union vs Union all IN SQL | SQL TUTORIAL

Union vs Union all IN SQL | SQL TUTORIAL SQL UNION vs UNION ALL Explained: Key Differences & Examples In this video, learn the difference between UNION and UNION ALL in SQL and when to use each. 🚀📊 We’ll walk you through real-world examples of both, showing how they combine results from multiple tables efficiently. ✅ What is UNION in SQL? The UNION operator combines the result sets of two or more SELECT queries and removes duplicate rows. ✅ What is UNION ALL in SQL? The UNION ALL operator also combines result sets, but it keeps duplicate rows. Want more similar videos- hit like, comment, share and subscribe ❤️Do Like, Share and Comment ❤️ ❤️ Like Aim 5000 likes! ❤️ ➖➖➖➖➖➖➖➖➖➖➖➖➖ ➖➖➖➖➖➖➖➖➖➖➖➖➖ script CREATE TABLE employees_2023 ( employee_id INT, name VARCHAR(50), department_id INT ); INSERT INTO employees_2023 (employee_id, name, department_id) VALUES (1, 'Alice', 101), (2, 'Bob', 102), (3, 'Charlie', 103); CREATE TABLE employees_2024 ( employee_id INT, name VARCHAR(50), department_id INT ); INSERT INTO employees_2024 (employee_id, name, department_id) VALUES (2, 'Bob', 102), (3, 'Charlie', 103), (4, 'David', 104); ➖➖➖➖➖➖➖➖➖➖➖➖➖ AWS DATA ENGINEER : https://www.youtube.com/playlist?list=PLOlK8ytA0MghpdMjb0m9zu1v9s_qbRP0q Azure data factory : https://youtube.com/playlist?list=PLOlK8ytA0MgguN5XidtQXbILxwCdJCUJE&si=iEICXHP80zGchUYh Azure data engineer playlist : https://youtube.com/playlist?list=PLOlK8ytA0MghBrzu0i6WlTBdoO1WdwV_e SQL PLAYLIST : https://www.youtube.com/playlist?list=PLOlK8ytA0MggGXIKmbfZ-_Xqcos3JKdV- PYSPARK PLAYLIST - https://www.youtube.com/playlist?list=PLOlK8ytA0MgjvOpd-088NRU_vTYw_aryH ➖➖➖➖➖➖➖➖➖➖➖➖➖ 📣Want to connect with me? Check out these links:📣 Join telegram to discuss https://t.me/+Cb98j1_fnZs3OTA1 ➖➖➖➖➖➖➖➖➖➖➖➖➖ what we have covered in this video: ➖➖➖➖➖➖➖➖➖➖➖➖➖ Hope you liked this video and learned something new :) See you in next video, until then Bye-Bye! ➖➖➖➖➖➖➖➖➖➖➖➖➖