SQL Server DATEADD() Function
Definition and Usage
The DATEADD() function adds or subtracts a specified time interval from a date.
Syntax
The date parameter is a valid date expression. The number is the interval you want to add; this number is positive for future times and negative for past times.
The datepart parameter can be one of the following values:
| datepart | Abbreviation |
|---|---|
| Year | yy, yyyy |
| Quarter | qq, q |
| Month | mm, m |
| Day of year | 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 |
Example
Suppose we have the following "Orders" table:
| OrderId | ProductName | OrderDate |
|---|---|---|
| 1 | Jarlsberg Cheese | 2008-11-11 13:23:44.657 |
Now, we want to add 45 days to "OrderDate" to find the payment date.
We use the following SELECT statement:
Result:
| OrderId | OrderPayDate |
|---|---|
| 1 | 2008-12-26 13:23:44.657 |