Hi. I have a table and one of the fields is year. When I add the table to Tableau, it configures this field automatically as a number. But when I change the data type to "Year" all references became "null". What do you think it might be the problem? I have done this kind of operation dozens of times and never had this problem before.
What do you mean to change the data type to Year, do you mean Text or date time. If you want to use the year as the dimension, change that to String.