UNION vs UNION ALL in SQL Explained | MySQL Result Combine Tutorial | Part-12 (Hindi)

Welcome dosto 👋
Is video me hum detail me samjhenge UNION & UNION ALL in SQL ke baare me
real examples ke saath, jo interview me bhi bahut pooche jaate hain! 💯

🔹 What is UNION in SQL?
🔹 What is UNION ALL?
🔹 Difference between UNION vs UNION ALL
🔹 Real World Examples with Student Data
🔹 Performance comparison (Which is faster?)
🔹 Important Interview Question Tips

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📍 Example Queries Used in Video:
SELECT student_id,name FROM student_2023
UNION
SELECT student_id,name FROM student_2024;

SELECT student_id FROM student_2023
UNION ALL
SELECT student_id FROM student_2024;
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🎓 Perfect for:
Beginner SQL Students | Data Analyst Aspirants | DBMS College Students | Interview Preparation

🔥 Key Takeaways:
UNION → Combines Results + Removes Duplicates
UNION ALL → Combines Results + Keeps Duplicates
Performance → UNION ALL is faster 🚀

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https://www.youtube.com/@TrainWithFaisal-p6e/playlists

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Видео UNION vs UNION ALL in SQL Explained | MySQL Result Combine Tutorial | Part-12 (Hindi) канала Train With Faisal