Oracle存储过程生成日期维度

在数据仓库的创建过程中，往往需要创建日期维度来为以后的数据分析来服务。

方面从多个日期角度：

如：年-月-日，年-季度-月-日，年-周-日

创建表的脚本如下（存储过程的创建过程中有一步操作是向time_dimension表中插入数据，所以首先需要创建好此表）

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

  );

存储过程脚本如下

CREATE OR REPLACE PROCEDURE SP_CREATE_TIME_DIMENSION(begin_date in varchar2,

                                                    end_date in varchar2) is



  /*SP_CREATE_TIME_DIMENSION: 生成时间维数据

  begin_date: 起始时间

  end_date:结束时间

  */

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(数字型)

   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');--年的第几周

   v_week_day := to_char(dDate, 'day'); --星期几





  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，存储过程创建完毕，下面我们需要传参并且只需存储过程，问题来了，如何通过PLSQL执行存储过程？之前都是在PLSQL中创建 SQL 窗口来执行procedure

结果报错，其实应该创建 命令窗口 来执行procedure

如下图：

命令窗口的执行脚本如下：

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，日期维度已经生成。