Find Products With Declining Sales Trend | LAG() Multi-Period Trend Detection | SQL Interview #70

Overview

This indexed tutorial covers Find Products With Declining Sales Trend | LAG() Multi-Period Trend Detection | SQL Interview #70 from Dive in Data.

In this video we solve one of the most advanced and most practically valuable SQL interview questions in the entire series ...

Watch the tutorial

Use the source video for the full walkthrough: https://www.youtube.com/watch?v=RWPMtBZDDxc

What to learn

1. Review the tutorial title and description to identify the workflow.
2. Follow along with the creator's steps in the video.
3. Pause at each major action and reproduce it in your own project.
4. Save any prompts, settings, or code snippets shown in the walkthrough.
5. Test the final result and adapt it to your use case.

Tips

• Keep the video open while you work through the steps.
• Compare your output with the creator's final result.
• Re-run the workflow with your own data or project requirements.