DATEADD#
Returns a specified date with the specified number interval (signed integer) added to a specified datepart of that date.
Syntax#
DATEADD (datepart , number , date )
Arguments#
datepart
Is the part of date to which an integer number is added. The following table lists all valid datepart arguments. User-defined variable equivalents are not valid.
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 |
microsecond |
mcs |
nanosecond |
ns |
number
Is an expression that can be resolved to an int that is added to a datepart of date. User-defined variables are valid. If you specify a value with a decimal fraction, the fraction is truncated and not rounded.
date
Is an expression that can be resolved to a time, date, smalldatetime, datetime, datetime2, or datetimeoffset value. date can be an expression, column expression, user-defined variable, or string literal. If the expression is a string literal, it must resolve to a datetime. To avoid ambiguity, use four-digit years.
Return types#
The return data type is the data type of the date argument, except for string literals. The return data type for a string literal is datetime.
Example#
SELECT DATEADD(hour, 23, '2007-10-30 12:15:32')