TALEND COMPARE DATE FUNCTION EXAMPLES

 1)if first one less than second one return number -1,

TalendDate.compareDate("2016-DEC-01" ,"2016-DEC-020","yyyy-MM-dd");

2)equlas return number 0,
TalendDate.compareDate("2016-DEC-01" ,"2016-DEC-01","yyyy-MM-dd");

3)bigger than return number 1. (can compare partly)
TalendDate.compareDate("2016-DEC-15" ,"2016-DEC-01","yyyy-MM-dd");

Working Code :
Var.start : TalendDate.parseDate("yyyy-MM-dd","2016-DEC-01")

Var.End : TalendDate.parseDate("yyyy-MM-dd","2016-DEC-01" )

TalendDate.compareDate(Var.start,Var.End,"yyyy-MM-dd");

COMPARE DATE () SUMMARY :

Date1 < Date2    :         Returns -1
Date1 = Date 2     :         Returns 0
Date1> Date 2    :         Returns 1