TIMESTAMPDIFF用法

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TIMESTAMPDIFF用法: 
TIMESTAMPDIFF(interval,datetime_expr1,datetime_expr2) 
返回日期或日期时间表达式datetime_expr1 和datetime_expr2the 之间的整数差。 

mysql> SELECT TIMESTAMPDIFF(MONTH,‘2009-12-01‘,‘2009-09-01‘); 
mysql> SELECT TIMESTAMPDIFF(YEAR,‘2009-05-01‘,‘2008-01-01‘); 

select TIMESTAMPDIFF(SECOND,DATE_FORMAT(NOW(),‘%Y-%m-%d %H:%i:%s‘),‘2013-03-07 15:43:00‘) 
from dual

SELECT DATE_FORMAT(MIN(entertime),‘%Y-%m-%d‘) as startDt, DATE_FORMAT(MAX(entertime), ‘%Y-%m-%d‘) as endDt
FROM table

TIMESTAMPDIFF用法

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原文地址：http://www.cnblogs.com/zhoucx66/p/5629984.html