mysql> SELECT @@global.time_zone, @@session.time_zone;

+--------------------+---------------------+
| @@global.time_zone | @@session.time_zone |
+--------------------+---------------------+
| SYSTEM             | SYSTEM              |
+--------------------+---------------------+
1行记录，用时0.00秒

mysql> create table CurrentTimeZone
   -> (
   -> currenttimeZone datetime
   -> )ENGINE=MYISAM;
查询成功，0行记录受影响，用时0.19秒

mysql> INSERT INTO CurrentTimeZone values(now());
查询成功，1行记录受影响，用时0.10秒

mysql> select *from CurrentTimeZone;

+---------------------+
| currenttimeZone     |
+---------------------+
| 2018-10-29 17:20:12 |
+---------------------+
1行记录，用时0.00秒