Скачать или смотреть Part-08 | UNION vs UNION ALL Operator in SQL | Data Science & Data Analysis

🔍 Union vs Union ALL in SQL | Data Science & Data Analysis Concepts

In this video, we will understand the difference between UNION and UNION ALL operators in SQL with practical examples. Whether you’re learning SQL for data science, data analysis, or database management, this tutorial will help you clearly grasp when to use each operator.

📌 Topics Covered:

What is UNION in SQL?

What is UNION ALL in SQL?

Key differences between UNION and UNION ALL

Removing duplicates vs keeping all records

Practical queries and examples in MS SQL Server

Best practices for data analysts and data scientists

💡 Why watch this video?

Build strong SQL fundamentals

Learn how data merging impacts your analysis

Improve performance of your SQL queries

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