Export (0) Print
Expand All

DATEDIFF (SSIS Expression)

Returns the number of date and time boundaries crossed between two specified dates. The datepart parameter identifies which date and time boundaries to compare.

DATEDIFF(datepart, startdate, endate)

datepart

Is the parameter that specifies which part of the date to compare and return a value for.

startdate

Is the start date of the interval.

endate

Is the end date of the interval.

The following table lists the dateparts and abbreviations recognized by the expression evaluator.

Datepart

Abbreviations

Year

yy, yyyy

Quarter

qq, q

Month

mm, m

Dayofyear

dy, y

Day

dd, d

Week

wk, ww

Weekday

dw, w

Hour

Hh

Minute

mi, n

Second

ss, s

Millisecond

Ms

DATEDIFF returns a null result if any argument is null.

A date literal must be explicitly cast to one of the date data types. For more information, see Integration Services Data Types.

An error occurs if a date is not valid, if the date or time unit is not a string, if the start date is not a date, or if the end date is not a date.

If the end date is earlier than the start date, the function returns a negative number. If the start and end dates are equal or fall within the same interval, the function returns zero.

This example calculates the number of days between two date literals. If the date is in "mm/dd/yyyy" format, the function returns 7.

DATEDIFF("dd", (DT_DBTIMESTAMP)"8/1/2003", (DT_DBTIMESTAMP)"8/8/2003")

This example returns the number of months between a date literal and the current date.

DATEDIFF("mm", (DT_DBTIMESTAMP)"8/1/2003",GETDATE())

This example returns the number of weeks between the date in the ModifiedDate column and the YearEndDate variable. If YearEndDate has a date data type, no explicit casting is required.

DATEDIFF("Week", ModifiedDate,@YearEndDate)
Was this page helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

ADD
Show:
© 2014 Microsoft