sql语句中获取datetime任何部分

sql语句中获取datetime的日期部分 
sql语句中 经常操作操作datetime类型数据。今天在写一个存储过程的时候需要将 一个datetime的值的 日期部分提取出来。网上有许多这方面的介绍。

主要方法还是通过日期格式的转换来获取。如下：

select left(convert(varchar,getdate(),21),7)： 2014-05
select left(convert(varchar,getdate(),21),4)： 2014
select convert(varchar(10),year('{1}')+'-'+convert(varchar(10),MONTH('{1}')) 
 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

如此可以采用：

select CONVERT(VARCHAR(100),GETDATE(),111)

select CONVERT(VARCHAR(100),GETDATE(),23)

当然可以通过 ：

Select CONVERT(varchar(100), GETDATE(), 8): 10:57:46

Select CONVERT(varchar(100), GETDATE(), 14): 10:57:46:967
Select CONVERT(varchar(100), GETDATE(), 108): 10:57:49
Select CONVERT(varchar(100), GETDATE(), 114): 10:57:49:547

等来 获取 datetime 的时间部分。

--年
select number as code ,CONVERT(varchar(5),number)+'年' as name
        from master..spt_values
       where type='P'
         and number between 2004 and YEAR(GETDATE())  order by convert(varchar(7),YEAR(GETDATE()),120) desc
        
        
 --年月               
select
convert(varchar(7),dateadd(month,hh.number,'2004-01-01'),120) code,
cast(year(dateadd(month,hh.number,'2004-01-01'))as varchar(4))+'年'+cast(month(dateadd(month,hh.number,'2004-01-01')) as varchar(2))+'月' name
from (select number
        from master..spt_values
       where type='P'
         and number between 0 and datediff(MONTH,'2004-01-01'
         ,cast(YEAR(GETDATE()) as varchar(4))+'-'+CAST(month(GETDATE()) as varchar(2))+'-01')) hh
         order by convert(varchar(7),dateadd(month,hh.number,'2004-01-01'),120) desc

--年季度
select distinct year(dateadd(month,hh.number,'2004-01-01')) [year],
cast(year(dateadd(month,hh.number,'2004-01-01'))as varchar(4))+'-'
+cast(datename(quarter,(dateadd(month,hh.number,'2004-01-01'))) as varchar(2)) code,
cast(year(dateadd(month,hh.number,'2004-01-01'))as varchar(4))+'年'
+cast(datename(quarter,(dateadd(month,hh.number,'2004-01-01'))) as varchar(2))+'季度' name
from (select number
        from master..spt_values
       where type='P'
         and number between 0 and datediff(MONTH,'2004-01-01'
         ,cast(YEAR(GETDATE()) as varchar(4))+'-'+CAST(month(GETDATE()) as varchar(2))+'-01')) hh
         order by year(dateadd(month,hh.number,'2004-01-01')) desc