Filter Functions

These functions are used to filter data to those items before or after a specified date. It is also possible to filter the data in groups.

Function	Syntax	Description
firstVersion()	firstVersion(<type> value, <type> group_by, date order_by)	Returns the first occurrence of a value with respect to a orderby_
lastVersion()	lastVersion(<type> value, <type> group_by, date order_by)	Returns the last occurrence of a value with respect to a orderby_