首先需要查看mysql的当前时区,用time_zone参数

mysql> show variables like '%time_zone%'; 
+------------------+--------+
| Variable_name | Value |
+------------------+--------+
| system_time_zone | CST |
| time_zone | SYSTEM |
+------------------+--------+
2 rows in set (0.00 sec)

1. 可以通过修改my.cnf
在 [mysqld] 之下加

default-time-zone=timezone

来修改时区。如:

default-time-zone = '+8:00'

修改完了记得记得重启msyql
注意一定要在 [mysqld] 之下加 ,否则会出现 unknown variable ‘default-time-zone=+8:00’

2. 另外也可以通过命令行在线修改

set time_zone = timezone
比如北京时间(GMT+0800)
set time_zone = '+8:00'; 如下:
mysql> set time_zone='+8:00';
Query OK, 0 rows affected (0.00 sec)

mysql> show variables like '%time_zone%'; 
+------------------+--------+
| Variable_name | Value |
+------------------+--------+
| system_time_zone | CST |
| time_zone | +08:00 |
+------------------+--------+
2 rows in set (0.00 sec)

3. 再通过select now()来验证时区

mysql> show variables like '%time_zone%'; 
+------------------+--------+
| Variable_name | Value |
+------------------+--------+
| system_time_zone | CST |
| time_zone | +08:00 |
+------------------+--------+
2 rows in set (0.00 sec)

mysql> select now();
+---------------------+
| now() |
+---------------------+
| 2013-08-05 10:35:31 |
+---------------------+
1 row in set (0.00 sec)

mysql> set time_zone='+0:00';
Query OK, 0 rows affected (0.00 sec)
mysql> show variables like '%time_zone%';
+------------------+--------+
| Variable_name | Value |
+------------------+--------+
| system_time_zone | CST |
| time_zone | +00:00 |
+------------------+--------+
2 rows in set (0.00 sec)
mysql> select now();
+---------------------+
| now() |
+---------------------+
| 2013-08-05 02:35:43 |
+---------------------+
1 row in set (0.00 sec)