用数据库SQL语句获得当前月的天数

时　间:2013-09-18 20:19:43
作　者:smeyou   ID：32560  城市：宁海
摘　要:用数据库SQL语句获得当前月的天数
正　文:

使用数据库SQL 语句获得 当前月的天数

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01.--获得当月天数 
02.select day(dateadd(mm,1,getdate())-day(getdate())) as 本月天数 ; 
03.select getdate() as 当前日期; 
04.select day(getdate()) as 目前第几天; 
05.select getdate()-day(getdate())  as 上个月最后一天; -- 减去了当前的天数 
06.select dateadd(mm,1,getdate())-day(getdate()) as 加上一个月; -- 也就是这个月的最后一天 
07.select day(dateadd(mm,1,getdate())-day(getdate())) as 获得当月天数; 

运行效果