建立时间维度表的脚本

ALTER PROCEDURE [dbo].[Create_time_by_day_dimension]

    -- Add the parameters for the stored procedure here

AS

BEGIN

    -- SET NOCOUNT ON added to prevent extra result sets from

    -- interfering with SELECT statements.

SET NOCOUNT ON;

begin try

drop table [time_by_day_dimension]

end try

begin catch

end catch

CREATE TABLE [dbo].[time_by_day_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 = '01/01/2006' --开始日期

 

WHILE @dDate < '12/31/2010' --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_by_day_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

END

如果时间维度的粒度精确到天的话，建议time_id不用自增列，使用
cast(the_day as int)来填充该列，可以避免事实表和维度表进行关联。当然使用自增列也可以避免关联，不过要做一些处理

按照kimball的设计理念，timekey最好是有意义的数值，如：1995-01-01 00:00:00转化成数值型可以是：19950101。
故按照bluexanadu的脚本，timekey可以这样写：
select cast((
left(convert(nvarchar,thedate,23),4)+
substring(convert(nvarchar,thedate,23),6,2)+
substring(convert(nvarchar,thedate,23),9,2))
as int) from dim_date

其实你完全可以把1995-01-01 00:00:00转化成转化成整型，整型只有4个字节，存储空间小，而且处理起来方便。

declare @d datetime
set @d='1995-01-01 00:00:00'
select cast(@d as int)

结果是：
34698

你可以把这个结果转化成日期：

select cast(34698 as datetime)

结果是：
1995-01-01 00:00:00.000