Business Rule In PowerApps

Business rules are used to applying Business logic and Validation on entities without writing the code.

In PowerApps Business Rule are apply on the Canvas App and Model-Driven App.
(Difference between canvas app and model-driven related with Business Rule is that
canvas app unable to access all actions of Business Rule,
where as model-driven is able to access all actions of Business Rules
).


Following are the business rule we can apply:
=> Set field values
=> Clear field values
=> Set field requirement levels
=> Show or hide fields
=> Enable or disable fields
=> Validate data and show error messages
=> Create business recommendations based on business intelligence


Follow below steps to create a Business Rule In PowerApps:

1. go to PowerApps => Sign in


2. go to Data => Entities => Open Targeted Entity => go to => Business Rule tab => click on Add business rule

3. Here set the condition on Entity fields after condition set the actions.

4. After condition actions match Add a business recommendation (this business recommendation work only for model-driven)


5. validate => save => activate

=> go to Data tab => Entities (open the targeted entity).


More into visit Microsoft site...
https://docs.microsoft.com/en-us/powerapps/maker/common-data-service/data-platform-create-business-rule