SQL Server DATEPART () function
SQL Server Date Functions Definition and Usage
DATEPART () function is used to return a single part of the date / time, such as year, month, day, hour, minute, and so on.
grammar
DATEPART(datepart,date)
date date expression argument is legitimate. datepart parameter can have the following values:
| datepart | 缩写 |
|---|---|
| 年 | yy, yyyy |
| 季度 | qq, q |
| 月 | mm, m |
| 年中的日 | dy, y |
| 日 | dd, d |
| 周 | wk, ww |
| 星期 | dw, w |
| 小时 | hh |
| 分钟 | mi, n |
| 秒 | ss, s |
| 毫秒 | ms |
| 微妙 | mcs |
| 纳秒 | ns |
Examples
Suppose we have the following "Orders" table:
| OrderId | ProductName | OrderDate |
|---|---|---|
| 1 | Jarlsberg Cheese | 2008-11-11 13:23:44.657 |
Here is the SELECT statement:
SELECT DATEPART(yyyy,OrderDate) AS OrderYear,
DATEPART(mm,OrderDate) AS OrderMonth,
DATEPART(dd,OrderDate) AS OrderDay,
FROM Orders
WHERE OrderId=1
DATEPART(mm,OrderDate) AS OrderMonth,
DATEPART(dd,OrderDate) AS OrderDay,
FROM Orders
WHERE OrderId=1
The results are as follows:
| OrderYear | OrderMonth | OrderDay |
|---|---|---|
| 2008 | 11 | 11 |
SQL Server Date Functions