DATEPART
Returns a number indicating the value of a part of a date value for a specified date.
For example, if you wanted the value of the month for a date, you might get a return value of 10 (for October).
Note: This function is equivalent to DATEPART in T-SQL. 
      Return Value
Integer
Syntax
DATEPART( datePart, date )
         
where:
- datePart is the part of the date
               for which you want to return the value. Possible values for this argument include
               these: 
- 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
 
 - date references the date for which you want to return the part value.