如上图:t1,t2代表要选择的时间段,t3,t4代表系统时间. 那么如果要获取选中时间段所有的交集为: 条件1 and ((t3>t1 and t1>t2) or (t3<t2 and t2<t4) or (t3<t2 and t1<t4))....条件3... PS:条件1,条件3代表其他条件,选中时间的交集的意思是只要选择的时间段跟系统字段本身时间区间有交集都符合条件.
mysql数据库获取年龄:TIMESTAMPDIFF(YEAR, [出生日期字段], CURDATE()) select * from (select name 姓名,TIMESTAMPDIFF(YEAR, [出生日期字段], CURDATE()) 年龄 from [表名] )a; sqlserver数据库获取年龄:DATEDIFF(yy,[出生日期字段],GETDATE()) select id AS 编号,SStudentName AS 姓名,DATEDIFF(yy,[出生日期字段],G
转自:http://blog.itpub.net/14766526/viewspace-1156100/ select GETDATE() as '当前日期',DateName(year,GetDate()) as '年',DateName(month,GetDate()) as '月',DateName(day,GetDate()) as '日',DateName(dw,GetDate()) as '星期',DateName(week,GetDate()) as '周数',DateName(h
SQL报表语句 SQL获取今日.本周.本月数据 本日:select * from table where datediff(dd,C_CALLTIME,getdate())=0 --C_CALLTIME 为日期字段 本周:select * from table where datediff(week,C_CALLTIME,getdate())=0 --C_CALLTIME 为日期字段 本月:select * from table where datediff(Month,