Type Conversion - Tableau
https://help.tableau.com/current/pro/desktop/en-us/functions_functions_typeconversion.htm
webSep 22, 2018 · DATEDIFF ('day', [Date Field], DATE ( [String Date Field]) ) Without the DATE function changing the data type, you'd get an error that "DATEDIFF is being called with (string, date, string)". Tip : Fields have default Data Types in the Data pane. In many instances, you don't need to use a type conversion function at all.
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