DATEDIFF

Returns the number of date and time boundaries crossed between two specified dates.

For example, you could use this function to find the number of days in a certain interval of dates.

NOTE: This function is equivalent to DATEDIFF in T-SQL.

Return Value

Integer

Syntax

DATEDIFF( datePart, startDate, endDate )

where:

• datePart specifies the part of the dates on which to calculate the difference. Possible values for this argument include the following:
  • year, yy, yyyy
  • quarter, q, qq
  • month, m, mm
  • week, wk, ww
  • day, d, dd
  • weekday, dw
  • dayofyear, dy, y
  • hour, hh
  • minute, mm, n
  • second, ss, s
  • millisecond, ms
• startDate is the beginning date for the calculation.
• endDate is the ending date for the calculation.

The startDate value is subtracted from the endDate.

NOTE: If the startDate is later than the endDate, then the return value is a negative number. If the result is out of range for integer values, the system returns an error.