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With the DATEADD function we can add or remove a datepart to a date. Below is a list of the dateparts we can add.
The DATEADD Function is one of the most used date functions.
| 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 |
Let’s make examples for a better understanding of DATEADD Function.
Add year to a date using DATEADD Function:
1 2 3 | SELECT DATEADD(year,1,'2019-01-01') AS YEAR_DATEPART, DATEADD(yy,1,'2019-01-01') AS YY_DATEPART, DATEADD(yyyy,1,'2019-01-01') AS YYYY_DATEPART |
Add week to a date using DATEADD Function:
1 | SELECT DATEADD(wk,1,'2019-01-01') AS week_wk_DATEPART |
You can use DATEADD function as follows:
1 2 3 | DECLARE @dateaddexample datetime SET @dateaddexample='2019-01-01' SELECT DATEADD(wk,1,@dateaddexample) AS week_wk_DATEPART |
Remove week from a date using DATEADD Function:
1 | SELECT DATEADD(wk,-1,'2019-01-01') AS week_wk_DATEPART |
