Flatten Nested Arrays in Power Automate: Efficient Bulk Excel Automation Tutorial

Turbocharge your Power Automate flows by flattening nested arrays at scale—no more slow, nested loops or excessive API calls! Discover how to leverage the Select action, smart string manipulation, and efficient workflow automation to transform complex data structures in just six actions. In this hands-on tutorial, you’ll learn how to explode nested arrays into a clean, scalable format—perfect for writing to Excel or integrating with Dataverse, SharePoint, or any API. We’ll compare the classic “apply to each” approach with a much faster, low-code method that saves time, reduces API consumption, and works wonders for digital transformation projects. What You’ll Learn: ✔️ Build scalable flows to flatten/explode nested arrays without nested looping ✔️ Automate data transformation for Excel, Dataverse, SharePoint, and more ✔️ Optimize API usage and cut down run times for large datasets ✔️ Apply advanced string and JSON manipulation in Power Automate cloud flows Timestamps: 00:00 – Instantly Flatten Nested Arrays in Power Automate: Why It Matters 00:49 – Understanding Nested Arrays and the Transformation Goal 03:42 – Traditional Nested Apply to Each: How It Works (and Its Limits) 05:23 – Advanced Six-Action Method: Select, String Manipulation & Efficiency 17:40 – Writing Transformed Data to Excel Tables 18:50 – Pro Tips: Writing Data to Excel Efficiently (Graph API & Office Scripts) 19:50 – Effortlessly Join Arrays Without Apply to Each 20:30 – Wrap-Up & Next Steps for Advanced Power Platform Automation #PowerAutomate #PowerPlatform #workflowautomation #LowCode #digitaltransformation Ready to streamline your data processing with Power Automate? Drop your questions or share your own automation challenges below! Don’t forget to check out the linked videos for more Power Platform tips and advanced workflow automation techniques. Additional Links: 🔗 https://youtu.be/R_bD8nAoJ8Y?list=PLzq6d1ITy6c138K_CM7hs9T1zuvvZufX_ Efficient array joining techniques. 🔗 https://youtu.be/gtlklzi6MDg?list=PLzq6d1ITy6c138K_CM7hs9T1zuvvZufX_ Efficient Excel data writing methods. 🔗 https://youtu.be/afqvGAb20Dw?list=PLzq6d1ITy6c138K_CM7hs9T1zuvvZufX_ Handling complex arrays in Power Automate. 🫠 About me: 👋 Hi, I'm Damien Bird — Power Platform Cloud Solution Architect at Microsoft ☁️ 🧠 Former Forum Super User (2021/22) & Business Applications MVP (2022) 🎤 Speaker at conferences across Europe, the US, and local UK user groups 💡 Passionate about sharing knowledge, solving problems, and empowering the community with the Power Platform! 📚 Explore more: 🔗 Blog: https://DamoBird365.com 🎥 Video & Quiz CPD: https://DamoBird365.com/YouTube 💖 Support the Channel: https://youtube.com/@DamoBird365/membership ☕ Buy Me a Coffee: https://BuyMeACoffee.com/DamoBird365 💼 LinkedIn: https://LinkedIn.com/In/DamoBird365 🐦 Twitter: https://x.com/DamoBird365 🌐 Bluesky: https://bsky.app/profile/DamoBird365.bsky.social 📜 Feedback or Request: https://forms.office.com/e/WAV1iF2Wis