oracle建时间维度

用存储过程如何建立时间维度表
create 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 
这有个例子，但不会用。@是什么意义，调用时还要设置参数么？

你参考的例子是MS Sql Server的，@XX是变量的意思。我改写了一下，因为oracle没有identity自增，所以用了sequence。
首先建表：
CREATE TABLE time_by_day_dimension(
  time_id int NOT NULL ,
  the_date date NULL ,
  the_day varchar2(15) NULL ,
  the_month varchar2(15) NULL ,
  the_year smallint NULL ,
  day_of_month smallint NULL ,
  week_of_year smallint NULL ,
  month_of_year smallint NULL ,
  fiscal_period varchar2(20) NULL
);

然后是创建序列：
create sequence seq_time_id start with 1 increment by 1 nocycle nocache ;

最后是过程：
create or replace
PROCEDURE Create_time_by_day_dimension
IS
WeekString varchar(12);
dDate DATE;
sMonth varchar(20);
iYear smallint;
iDayOfMonth smallint;
iWeekOfYear smallint;
iMonthOfYear smallint;
adddays int;
BEGIN
adddays := 1 ;
dDate := to_date('01/01/2006','mm/dd/yyyy'); 

WHILE (dDate < to_date('12/31/2010','mm/dd/yyyy')) 
loop
   WeekString := to_char(dDate, 'day'); --星期几
   sMonth:=to_char(dDate, 'mm');--月份
   iYear:= to_char(dDate, 'yyyy');--年
   iDayOfMonth:=to_char(dDate, 'dd');--日(字符型)
   iWeekOfYear:= to_char(dDate,'fmww');--年的第几周
   iMonthOfYear:=to_number(sMonth);--日(数字型)

  INSERT INTO time_by_day_dimension(time_id,the_date, the_day, the_month, the_year, day_of_month, week_of_year, month_of_year) 
  VALUES (seq_time_id.nextval,dDate, WeekString, sMonth, iYear, iDayOfMonth, iWeekOfYear, iMonthOfYear);

   dDate :=  dDate + adddays;
END loop;
end;

最后少了一个字段：季度。你再学习添加一下吧！