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Democratizing Application Development with AppSheet

You're reading from   Democratizing Application Development with AppSheet A citizen developer's guide to building rapid low-code apps with the powerful features of AppSheet

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Product type Paperback
Published in Jan 2023
Publisher Packt
ISBN-13 9781803241173
Length 396 pages
Edition 1st Edition
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Authors (3):
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Suvrutt Gurjar Suvrutt Gurjar
Author Profile Icon Suvrutt Gurjar
Suvrutt Gurjar
Koichi Tsuji Koichi Tsuji
Author Profile Icon Koichi Tsuji
Koichi Tsuji
Takuya Miyai Takuya Miyai
Author Profile Icon Takuya Miyai
Takuya Miyai
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Toc

Table of Contents (20) Chapters Close

Preface 1. Part 1 – Introduction and Getting Started FREE CHAPTER
2. Chapter 1: Getting Started with AppSheet 3. Part 2 – App Editor and Main Features
4. Chapter 2: Understanding App Editor and Data Sources 5. Chapter 3: Presenting App Data with UX/Views 6. Chapter 4: Manipulating Data with Functions and Expressions 7. Chapter 5: Manipulating Data with Behaviors and Actions 8. Chapter 6: Controlling App Users and Data Security 9. Chapter 7: Managing the App Environment 10. Part 3 – Advanced Features and External Services
11. Chapter 8: Automating Recurring Data Changes and Scheduling Tasks 12. Chapter 9: Using Intelligence and Advanced Features 13. Chapter 10: Extending App Capabilities with Third-Party Services 14. Part 4 – App Templates and Tricks for App Building
15. Chapter 11: Building More Apps with App Templates 16. Chapter 12: Tips and Tricks 17. Chapter 13: Appendix 18. Index 19. Other Books You May Enjoy

Column settings

In this section, we would like to introduce a trick that is going to solve one of the most frequently asked questions in the AppSheet community. The question is how to establish a many-to-many relationship between two tables. Let’s dive in.

Establishing many-to-many relationships

The sample app name is Chapter 12_06: https://www.appsheet.com/templates/sample?appGuidString=3fb14df3-062c-46bf-997a-18da2d878be4.

If we set one column to the REF type, then it will construct a one-to-many relationship between the two tables. The referenced table in the REF column may have an association with multiple rows. One parent row can have multiple child rows, so it is called a one-to-many relationship. Then, if we wish to establish a relationship between multiple rows on one table with multiple rows on another table, how can we achieve this task? As for real-world examples, we may have an app to manage the order of goods, where the app possibly has a table of products...

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