mysql> show variables like '%zone%';
+------------------+--------+
| Variable_name    | Value  |
+------------------+--------+
| system_time_zone | UTC    |
| time_zone        | SYSTEM |
+------------------+--------+
2 rows in set

mysql> select now();
+---------------------+
| now()               |
+---------------------+
| 2019-10-15 05:37:07 |
+---------------------+
1 row in set
# 当前时间是  2019-10-15 13:37:07，差了 8 小时