You just use the subtraction operator "-" with operands of type xs:date, this 
returns a dayTimeDuration, which you can turn into an integer number of days by 
dividing it by xs:dayTimeDuration('P1D').

Michael Kay
Saxonica


On 12 Apr 2013, at 18:04, sudheshna iyer wrote:

> Hello Team,
> 
> I need a xquery function which takes two dates and return number of days that 
> lapsed between these two dates. Input to this function can be a 2 strings of 
> type "mm/dd/yyyy 00:00:00".
> 
> Can any of you have a function handy to do this?
> 
> Thank you very much in advance.
> 
> 
> 
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