这是表用户的简单版本：
+--------------+-------------------+
| id | timezone |
+--------------+-------------------+
| 1 | 'Europe/Helsinki' |
| 2 | 'Europe/Paris' |
+--------------+-------------------+
这是表用户的简单版本：
+--------------+-------------------+
| id | timezone |
+--------------+-------------------+
| 1 | 'Europe/Helsinki' |
| 2 | 'Europe/Paris' |
+--------------+-------------------+
SELECT * FROM users WHERE hour(CONVERT_TZ(now(),server_tz,`timezone`))=16