MONTHDIFF
The MONTHDIFF function calculates the difference, in months, between two given dates.
Usage
monthdiff(format, date1, date2) : num
See DATE for a description of the date format.
Examples
The following example adds a column x
with the value 2.
... | CALC x monthdiff('dd/MM/yyyy', '16/06/2017', '18/08/2017') | ...