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;BEGINadddays := 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。