SQL NOW() 函数

SQL 教程 · 2019-03-04 10:59:03

NOW() 函数

NOW() 函数返回当前系统的日期和时间。

SQL NOW() 语法

SELECT NOW() FROM table_name;

演示数据库

在本教程中,我们将使用 CODERCTO 样本数据库。

下面是选自 "Websites" 表的数据:

+----+--------------+---------------------------+-------+---------+
| id | name         | url                       | alexa | country |
+----+--------------+---------------------------+-------+---------+
| 1  | Google       | https://www.google.cm/    | 1     | USA     |
| 2  | 淘宝          | https://www.taobao.com/   | 13    | CN      |
| 3  | 码农教程      | http://www.codercto.com/    | 4689  | CN      |
| 4  | 微博          | http://weibo.com/         | 20    | CN      |
| 5  | Facebook     | https://www.facebook.com/ | 3     | USA     |
| 7  | stackoverflow | http://stackoverflow.com/ |   0 | IND     |
+----+---------------+---------------------------+-------+---------+

SQL NOW() 实例

下面的 SQL 语句从 "Websites" 表中选取 name,url,及当天日期:

实例

SELECT name, url, Now() AS date
FROM Websites;

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