SQL Series Basic to Advance | L-19 UNION vs UNION ALL in SQL
SQL Series Basic to Advance | SQL Mastery | L-19 UNION vs UNION ALL in SQL
📌 In this video, we dive into UNION and UNION ALL in SQL with clear examples and real-world use cases. Understand how to merge result sets effectively!
🔹 Topics Covered:
✔️ UNION – Combines results from multiple SELECT queries and removes duplicate records
✔️ UNION ALL – Combines all results including duplicates from multiple SELECT queries
✔️ Syntax & Examples – Simple demonstrations for both UNION and UNION ALL
✔️ Key Differences – Performance and result differences explained clearly
💡 Why Learn UNION & UNION ALL?
These operators are essential when working with data spread across multiple queries or tables. Knowing when to use each can optimize your database performance and result accuracy.
📄 Lecture Notes:
📌 https://drive.google.com/file/d/1Vy2S9TsLM5N11NdScOCvaR3qGffYA0EA/view
📂 Complete SQL Series Notes:
📌https://drive.google.com/drive/u/6/folders/1agYJ7plxeQ8Jtn5oTzyd2HaPy54TxrFF
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Видео SQL Series Basic to Advance | L-19 UNION vs UNION ALL in SQL канала IT Engineers
📌 In this video, we dive into UNION and UNION ALL in SQL with clear examples and real-world use cases. Understand how to merge result sets effectively!
🔹 Topics Covered:
✔️ UNION – Combines results from multiple SELECT queries and removes duplicate records
✔️ UNION ALL – Combines all results including duplicates from multiple SELECT queries
✔️ Syntax & Examples – Simple demonstrations for both UNION and UNION ALL
✔️ Key Differences – Performance and result differences explained clearly
💡 Why Learn UNION & UNION ALL?
These operators are essential when working with data spread across multiple queries or tables. Knowing when to use each can optimize your database performance and result accuracy.
📄 Lecture Notes:
📌 https://drive.google.com/file/d/1Vy2S9TsLM5N11NdScOCvaR3qGffYA0EA/view
📂 Complete SQL Series Notes:
📌https://drive.google.com/drive/u/6/folders/1agYJ7plxeQ8Jtn5oTzyd2HaPy54TxrFF
🔔 Subscribe for more SQL & Database tutorials!
👍 Like & Share if this video helps you!
🔗 Connect with Us Here:
📸 Instagram:
https://www.instagram.com/itengineers246/
🐦 Twitter:
https://x.com/IT_Engineers246?t=g7fnf...
📘 Facebook:
https://www.facebook.com/profile.php?...
📱 Telegram:
https://t.me/ITEngineers246
Видео SQL Series Basic to Advance | L-19 UNION vs UNION ALL in SQL канала IT Engineers
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5 апреля 2025 г. 19:36:32
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