Oracle存儲過程生成日期維度

在數據倉庫的創建過程中，往往需要創建日期維度來為以后的數據分析來服務。

方面從多個日期角度：

如：年-月-日，年-季度-月-日，年-周-日

創建表的腳本如下（存儲過程的創建過程中有一步操作是向time_dimension表中插入數據，所以首先需要創建好此表）

create table TIME_DIMENSION
(
  the_date     NUMBER not null,
  date_name    NVARCHAR2(15),
  the_year     NUMBER,
  year_name    NVARCHAR2(10),
  the_quarter  VARCHAR2(10),
  quarter_name NVARCHAR2(10),
  the_month    NUMBER,
  month_name   NVARCHAR2(10),
  the_week     NUMBER,
  week_name    NVARCHAR2(10),
  week_day     NVARCHAR2(10)
)
tablespace TBS_COGNOS
  pctfree 10
  initrans 1
  maxtrans 255
  storage
  (
    initial 64
    next 1
    minextents 1
    maxextents unlimited
  );

 

存儲過程腳本如下

CREATE OR REPLACE PROCEDURE SP_CREATE_TIME_DIMENSION(begin_date in varchar2,
                                                    end_date in varchar2) is

  /*SP_CREATE_TIME_DIMENSION: 生成時間維數據
  begin_date: 起始時間
  end_date:結束時間
  */
dDate date;
v_the_date number;
v_the_year varchar2(4);
v_the_quarter varchar2(2);
v_the_month varchar2(10);
v_the_month2 varchar2(2);
v_the_week varchar2(2);
v_the_day varchar2(10);
v_the_day2 varchar2(2);
v_week_day nvarchar2(10);

adddays int;
BEGIN
adddays := 1 ;
dDate := to_date(begin_date,'yyyymmdd');

WHILE (dDate <= to_date(end_date,'yyyymmdd'))
loop
   v_the_date := to_number(to_char(dDate,'yyyymmdd'));--key值
   v_the_year:= to_char(dDate, 'yyyy');--年
   v_the_quarter := to_char(dDate, 'q');--季度
   v_the_month:=to_char(dDate, 'mm');--月份(字符型)
   v_the_month2:=to_number(to_char(dDate, 'mm'));--月份(數字型)
   v_the_day:=to_char(dDate, 'dd');--日(字符型)
   v_the_day2:=to_char(dDate, 'dd');
   v_the_week:= to_char(dDate,'fmww');--年的第幾周
   v_week_day := to_char(dDate, 'day'); --星期幾


  insert into time_dimension(the_date,date_name,the_year,year_name,
                            the_quarter,quarter_name,the_month,
                            month_name,the_week,week_name,week_day)
                      values(v_the_date,v_the_year||'年'||v_the_month2||'月'||v_the_day2||'日',v_the_year,v_the_year||'年',
                            v_the_year||'Q'||v_the_quarter,v_the_year||'年'||v_the_quarter||'季度',to_number(v_the_year||v_the_month),
                            v_the_year||'年'||v_the_month2||'月',v_the_week,'第'||v_the_week||'周',
                            v_week_day);

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

 

 

OK，存儲過程創建完畢，下面我們需要傳參並且只需存儲過程，問題來了，如何通過PLSQL執行存儲過程？之前都是在PLSQL中創建 SQL 窗口來執行procedure

結果報錯，其實應該創建 命令窗口 來執行procedure

如下圖：

命令窗口的執行腳本如下：

SQL> exec SP_CREATE_TIME_DIMENSION(20140101,20140630);
 
PL/SQL procedure successfully completed
 
SQL> commit;
 
Commit complete
 
SQL> select * from time_dimension;

OK，截止目前，日期維度已經生成。