How to Use the DATEADD() Function in SQL Server: A Complete Guide
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Syntax:
<span class="pln"> DATEADD </span><span class="pun">(</span><span class="pln">datepart</span><span class="pun">,</span><span class="pln"> </span><span class="typ">NumberToAdd</span><span class="pun">,</span><span class="pln"> date</span><span class="pun">)</span><span class="pln"> </span>
DATEADD (datepart, NumberToAdd, date) - Returns the DateTime, after adding specified NumberToAdd, to the datepart specified of the given date.
| DatePart | Abbreviations |
|---|---|
| year | yy, yyyy |
| quarter | qq, q |
| month | mm, m |
| dayofyear | dy, y |
| day | dd, d |
| week | wk, ww |
| weekday | dw |
| hour | hh |
| minute | mi, n |
| second | ss, s |
| millisecond | ms |
| microsecond | mcs |
| nanosecond | ns |
| TZoffset | tz |
| ISO_WEEK | isowk, isoww |
Code:
<span class="pln"> </span><span class="typ">Select</span><span class="pln"> </span><span class="typ">DateAdd</span><span class="pun">(</span><span class="pln">DAY</span><span class="pun">,</span><span class="pln"> </span><span class="lit">20</span><span class="pun">,</span><span class="pln"> </span><span class="str">'2012-08-30 19:45:31.793'</span><span class="pun">)</span><span class="pln"> </span><span class="typ">Select</span><span class="pln"> </span><span class="typ">DateAdd</span><span class="pun">(</span><span class="pln">DAY</span><span class="pun">,</span><span class="pln"> </span><span class="pun">-</span><span class="lit">20</span><span class="pun">,</span><span class="pln"> </span><span class="str">'2012-08-30 19:45:31.793'</span><span class="pun">)</span><span class="pln"> </span>
Output:
The above code will produce the following result-
<span class="pln"> </span><span class="lit">2012</span><span class="pun">-</span><span class="lit">09</span><span class="pun">-</span><span class="lit">19</span><span class="pln"> </span><span class="lit">19</span><span class="pun">:</span><span class="lit">45</span><span class="pun">:</span><span class="lit">31.793</span><span class="pln"> </span><span class="lit">2012</span><span class="pun">-</span><span class="lit">08</span><span class="pun">-</span><span class="lit">10</span><span class="pln"> </span><span class="lit">19</span><span class="pun">:</span><span class="lit">45</span><span class="pun">:</span><span class="lit">31.793</span><span class="pln"> </span>
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