--也许有了这张表，你的工作会轻松很多！

CREATE TABLE [dbo].[time_dimension] (
   [time_id] [int] IDENTITY (1, 1) NOT NULL ,
   [the_date] [datetime] NULL ,
   [the_day] [nvarchar] (15) NULL ,
   [the_month] [nvarchar] (15) NULL ,
   [the_year] [smallint] NULL ,
   [day_of_month] [smallint] NULL ,
   [week_of_year] [smallint] NULL ,
   [month_of_year] [smallint] NULL ,
   [quarter] [nvarchar] (2) NULL ,
   [fiscal_period] [nvarchar] (20) NULL
) ON [PRIMARY]

 
DECLARE @WeekString varchar(12),
@dDate SMALLDATETIME,
@sMonth varchar(20),
@iYear smallint,
@iDayOfMonth smallint,
@iWeekOfYear smallint,
@iMonthOfYear smallint,
@sQuarter varchar(2),
@sSQL varchar(100),
@adddays int
 
SELECT @adddays = 1 --日期增量（可以自由设定）
SELECT @dDate = '01/01/2002' --开始日期
 
WHILE @dDate < '12/31/2004'  --结束日期
BEGIN
 
   SELECT @WeekString = DATENAME (dw, @dDate)
   SELECT @sMonth=DATENAME(mm,@dDate)
   SELECT @iYear= DATENAME (yy, @dDate)
   SELECT @iDayOfMonth=DATENAME (dd, @dDate)
   SELECT @iWeekOfYear= DATENAME (week, @dDate)
   SELECT @iMonthOfYear=DATEPART(month, @dDate)
   SELECT @sQuarter = 'Q' +  CAST(DATENAME (quarter, @dDate)as varchar(1))

   INSERT INTO time_dimension(the_date, the_day, the_month, the_year,
   day_of_month,
   week_of_year, month_of_year, quarter) VALUES
   (@dDate, @WeekString, @sMonth, @iYear, @iDayOfMonth, @iWeekOfYear,
   @iMonthOfYear, @sQuarter)
   SELECT @dDate = @dDate + @adddays
END
GO

select * from time_dimension

---补个小日历

create table a(dd datetime,groups int)
declare @count int,@i int,@starttime datetime
set @starttime='2003-01-01'
set @count=365
set @i=0
while @count>0
 begin
  insert a
  select @starttime,datename(week,@starttime)
  set @starttime=@starttime+1
  set @count=@count-1
  set @i=@i+1
 end

-----月历:

create proc years
 @month int
AS
select max(case datepart(dw,dd) when 2 then cast(day(dd)as varchar(2)) else '' end) as '星期一',
max(case datepart(dw,dd) when 3 then cast(day(dd)as varchar(2)) else '' end) as '星期二',
max(case datepart(dw,dd) when 4 then cast(day(dd)as varchar(2)) else '' end) as '星期三',
max(case datepart(dw,dd) when 5 then cast(day(dd)as varchar(2)) else '' end) as '星期四',
max(case datepart(dw,dd) when 6 then cast(day(dd)as varchar(2)) else '' end) as '星期五',
max(case datepart(dw,dd) when 7 then cast(day(dd)as varchar(2)) else '' end) as '星期六',
max(case datepart(dw,dd) when 1 then cast(day(dd)as varchar(2)) else '' end) as '星期日'
from a where datepart(MM,dd)=@month group by groups
go
exec years 10   --十月份的日历！
----------------
星期一  星期二  星期三  星期四  星期五  星期六  星期日 
---- ---- ---- ---- ---- ---- ----
          1    2    3    4    5
6    7    8    9    10   11   12
13   14   15   16   17   18   19
20   21   22   23   24   25   26
27   28   29   30   31