Mysql怎么对字符串进行排序

Mysql对字符串进行排序的方法示例：

利用ORDER BY关键字进行排序。

语法：

SELECT column_name,column_name
FROM table_name
ORDER BY column_name,column_name ASC|DESC;

示例：

假设有一个Websites表数据如下：

+----+--------------+---------------------------+-------+---------+
| id | name | url | alexa | country |
+----+--------------+---------------------------+-------+---------+
| 1 | Google | https://www.google.cm/ | 1 | USA |
| 2 | 淘宝 | https://www.taobao.com/ | 13 | CN |
| 3 | 微博 | http://weibo.com/ | 20 | CN |
| 4 | Facebook | https://www.facebook.com/ | 3 | USA |
+----+--------------+---------------------------+-------+---------+

进行排序：

SELECT * FROM Websites ORDER BY alexa asc;//ASC为升序，DESC为降序，默认是升序

结果：

+----+--------------+---------------------------+-------+---------+
| id | name | url | alexa | country |
+----+--------------+---------------------------+-------+---------+
| 1 | Google | https://www.google.cm/ | 1 | USA |
| 5 | Facebook | https://www.facebook.com/ | 3 | USA |
| 2 | 淘宝 | https://www.taobao.com/ | 13 | CN |
| 4 | 微博 | http://weibo.com/ | 20 | CN |
+----+--------------+---------------------------+-------+---------+