What is Union and Union All in SQL?
Difference between Union and Union All in SQL?
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Chapters:
00:00 Union vs. Union All in SQL
00:11 Understanding Union and Union All in SQL
00:24 Concept of Appending Data
00:31 Example: Appending Data in Excel
00:54 Clarification on Appending Data
01:00 Example Tables: Employee Data
02:00 Exploring the Second Table
02:28 Difference in Salary Values
02:48 Using Union and Union All Functions in SQL
03:14 Syntax for Union All in SQL
05:07 How Union Handles Duplicate Rows
05:42 Running the Union Command
05:55 Comparing Results: Union vs. Union All
06:09 Key Differences Between Union and Union All
In this video, we explore the concepts of Union and Union All in SQL. Both functions are used to combine data from two tables. Union appends data and removes duplicate records, considering the entire row for duplication. Union All also appends data but keeps all records, including duplicates. The video demonstrates how to use these functions with examples, highlighting the importance of matching column orders and data types in the tables being combined. The video concludes by encouraging viewers to like, share, and subscribe for more content.