Input Form - Validation Rule to check that a value does not Exist
It would be a good addition to be able to make sure a value added to a field on a form does not exist within the data i.e. must be unique.
Example adding a new Product.
The SKU code is the Unique key.
So when I created new product this must be unique within the Data
If I enter 001 on the form I would like it to check the Field SKU Code in the Data and if it exist fail the validation.