If you have a dropdown field with 3 options, the same user will be able to submit the form once for each option. If the same option is selected twice, the form will not pass validation.

Use this code to check if the current user already has an entry in Form B when Form A is submitted. If the user does NOT have an entry in that form, this code will create a new entry in Form B. If they do have an entry in Form B, it will update the entry. This example specifically will populate a field in Form B with the user's total number of submissions in Form A.

This example will allow you to order dates in a view by their month, ignoring the year in the date field.