sql按时间条件查询的一些语句

今天的所有数据：select * from 表名 where DateDiff(dd,datetime类型字段,getdate())=0

昨天的所有数据：select * from 表名 where DateDiff(dd,datetime类型字段,getdate())=1

7天内的所有数据：select * from 表名 where DateDiff(dd,datetime类型字段,getdate())<=7

30天内的所有数据：select * from 表名 where DateDiff(dd,datetime类型字段,getdate())<=30

本月的所有数据：select * from 表名 where DateDiff(mm,datetime类型字段,getdate())=0

本年的所有数据：select * from 表名 where DateDiff(yy,datetime类型字段,getdate())=0

select count(1) from BK_KHXX where  DateDiff(dd,CreateTime,getdate())=0 --今天

select count(1) from BK_KHXX where  DateDiff(dd,CreateTime,getdate())=1 --昨天

select count(1) from BK_KHXX where DateDiff(mm,CreateTime,getdate())=0 --本月

select count(1) from BK_KHXX where DateDiff(mm,CreateTime,getdate())=1 --上月

Select CONVERT(varchar(100), GETDATE(), 0): 05 16 2006 10:57AM
Select CONVERT(varchar(100), GETDATE(), 1): 05/16/06
Select CONVERT(varchar(100), GETDATE(), 2): 06.05.16
Select CONVERT(varchar(100), GETDATE(), 3): 16/05/06
Select CONVERT(varchar(100), GETDATE(), 4): 16.05.06
Select CONVERT(varchar(100), GETDATE(), 5): 16-05-06
Select CONVERT(varchar(100), GETDATE(), 6): 16 05 06
Select CONVERT(varchar(100), GETDATE(), 7): 05 16, 06
Select CONVERT(varchar(100), GETDATE(), 8): 10:57:46
Select CONVERT(varchar(100), GETDATE(), 9): 05 16 2006 10:57:46:827AM
Select CONVERT(varchar(100), GETDATE(), 10): 05-16-06
Select CONVERT(varchar(100), GETDATE(), 11): 06/05/16
Select CONVERT(varchar(100), GETDATE(), 12): 060516
Select CONVERT(varchar(100), GETDATE(), 13): 16 05 2006 10:57:46:937
Select CONVERT(varchar(100), GETDATE(), 14): 10:57:46:967
Select CONVERT(varchar(100), GETDATE(), 20): 2006-05-16 10:57:47
Select CONVERT(varchar(100), GETDATE(), 21): 2006-05-16 10:57:47.157
Select CONVERT(varchar(100), GETDATE(), 22): 05/16/06 10:57:47 AM
Select CONVERT(varchar(100), GETDATE(), 23): 2006-05-16
Select CONVERT(varchar(100), GETDATE(), 24): 10:57:47
Select CONVERT(varchar(100), GETDATE(), 25): 2006-05-16 10:57:47.250
Select CONVERT(varchar(100), GETDATE(), 100): 05 16 2006 10:57AM
Select CONVERT(varchar(100), GETDATE(), 101): 05/16/2006
Select CONVERT(varchar(100), GETDATE(), 102): 2006.05.16
Select CONVERT(varchar(100), GETDATE(), 103): 16/05/2006
Select CONVERT(varchar(100), GETDATE(), 104): 16.05.2006
Select CONVERT(varchar(100), GETDATE(), 105): 16-05-2006
Select CONVERT(varchar(100), GETDATE(), 106): 16 05 2006
Select CONVERT(varchar(100), GETDATE(), 107): 05 16, 2006
Select CONVERT(varchar(100), GETDATE(), 108): 10:57:49
Select CONVERT(varchar(100), GETDATE(), 109): 05 16 2006 10:57:49:437AM
Select CONVERT(varchar(100), GETDATE(), 110): 05-16-2006
Select CONVERT(varchar(100), GETDATE(), 111): 2006/05/16
Select CONVERT(varchar(100), GETDATE(), 112): 20060516
Select CONVERT(varchar(100), GETDATE(), 113): 16 05 2006 10:57:49:513
Select CONVERT(varchar(100), GETDATE(), 114): 10:57:49:547
Select CONVERT(varchar(100), GETDATE(), 120): 2006-05-16 10:57:49
Select CONVERT(varchar(100), GETDATE(), 121): 2006-05-16 10:57:49.700
Select CONVERT(varchar(100), GETDATE(), 126): 2006-05-16T10:57:49.827
Select CONVERT(varchar(100), GETDATE(), 130): 18 ???? ?????? 1427 10:57:49:907AM
Select CONVERT(varchar(100), GETDATE(), 131): 18/04/1427 10:57:49:920AM

 between Month(GetDate())-6 and Month(GetDate())   

 between day('"&trim(request("sj_from"))&"')  and   day('"&trim(request("sj_to"))&"')   

 sql_b="SELECT  * FROM    BK_KHXX_Record AS t WHERE   createtime= (SELECT MIN(createtime) FROM   BK_KHXX_Record    WHERE   CreateID = t.CreateID  AND CONVERT(VARCHAR(8) , createtime , 112) = CONVERT(VARCHAR(8) , t.createtime , 112))  and   order by  createtime desc"  --查询按每天的第一条数据

sql_a="select * from BK_KHXX_Record where DelFlag=0 and convert(varchar,createtime,23)='"&year(time2) & "-" &right("00"&month(time2),2)& "-" &right("00"&day(time2),2)&"'  order by RecordTime desc"                   --按xxxx-0x-0x asp 查询