Day 20 - UNION vs UNION ALL in SQL | Key Differences with Examples
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Day 20 - UNION vs UNION ALL in SQL | Key Differences with Examples
Welcome to Day 20 of the SQL Made Simple series! 🚀 In this lesson, we’ll dive into the UNION and UNION ALL operators in SQL. You’ll learn: What UNION and UNION ALL do. The key difference between removing duplicates vs keeping all rows. How to use them with a real-world Customers and Clients dataset. Step-by-step examples to master these ...
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