PS Query & SQL

Understanding SQL window functions can greatly improve how we work with datasets, especially when multiple records exist for a single entity, such as students.

I've created a tutorial on using NTH_VALUE, a powerful analytic function that allows you to retrieve the nth record from an ordered partition. While this example is based on financial aid data, the same technique can be applied to any area where multiple rows of data need to be transformed into a single-row format per student.

What's in the tutorial?

• Introduction to NTH_VALUE and how it works
• SQL query example that flattens student grant data
• Step-by-step instructions for PS Query implementation
• Key takeaways for applying NTH_VALUE to different use cases

This function is particularly useful when working with financial aid awards, loans, scholarships, academic records, enrollments, and other student data where multiple entries exist per student.

I've attached the full tutorial as a PDF-feel free to download it and test it out!

If you have questions or want to discuss other SQL window functions that help with student data reporting, drop a comment below! I am always open to updating any documents I have posted if they can be improved.