mysql的TIMESTAMPDIFF

SELECT (TIMESTAMPDIFF(MINUTE, STR_to_date('2018-8-30 12:15:52', '%Y-%m-%d %H:%i:%s') , STR_to_date('2018-8-31 15:05:31', '%Y-%m-%d %H:%i:%s')))/60/24

 

得到

1.11736111