i have used the duplicate detection rule and also used alternate keys features to check if country is already present when users creates new record, but this both features will work only after users click on save button.
since there are more than 30 column to be filled and selecting country is the first column, it will be waste of time for users to fill all the 30 records then show the error message that country is already present,
So wanted to check if there is any way , where when users select the country , it should that this country is already present and users don't have to click on save button to notice this
basically i want country column should be unique column, but i want app to detect before clicking on save button ,