mysql時間(datetime)精確到毫秒

https://blog.csdn.net/qq_33862644/article/details/83744416

 

ALTER TABLE device_upgrade_info MODIFY COLUMN start_time DATETIME(3);

 

TIMESTAMP(3)與 DATETIME(3)意思是保留3位毫秒數

TIMESTAMP(6)與 DATETIME(6)意思是保留6位毫秒數