What is Lead Function in Structured Query Language (SQL)?
What is Lead Function in SQL?
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Chapters:
00:00 - Introduction
00:11 - What is the LEAD Function in SQL?
00:22 - How LEAD Function Works in SQL
00:34 - Understanding Partition By in SQL
00:43 - Practical Example Setup
01:02 - Practical Implementation
01:34 - Running the Example
02:07 - Analyzing the Results
02:39 - Real-World Application
02:59 - Conclusion
In this video on Educate Cube, the LEAD function in SQL is discussed. The LEAD function is a type of window function that allows you to access data from subsequent rows within a specified window or partition. It is useful for retrieving values from the next row based on a defined order.
For example, if you have a sequence of numbers and want to see the next number in the sequence for each row, the LEAD function will bring that next value into the current row. This can be helpful for tasks like generating sequences for analysis.
A practical example is provided where the LEAD function is used to get the next row's value for a sales unit. Although the function hasn’t been used in projects yet, it's valuable to know for future analysis needs.
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