When doing validation for numbers or dates, the column selection is used.
NOTE: The features described are for use with the Classic-style Form Builder. If you are using the SharePoint Modern experience, our recommendation is to use the newer Form designer tool – validation is one of the functions controlled as a part of that, rather than as a stand-alone.
The Column validation setting is intended for fields with numeric values including dates. When doing validation it is useful to compare against other field values to set up compound conditions.
10/1/2019 3:44 PM