我想一个prodedure,每月自动生成一个表以备份，表名中要引用参数。

如：原表名是risk_control.DPD_SUM，每月月初需做一份备份表：risk_control.DPD_SUM20141031.

Procedure 如下：

create or replace procedure sp_bk_dpd_info_table as

Balance_date1 DATE;

Balance_date2 VARCHAR2(10);

v_date date;

begin

  select Trunc(SYSDATE, 'MONTH')- 1  into Balance_date1  from dual;

  select TO_CHAR(Trunc(SYSDATE, 'MONTH')-1,'YYYYMMDD')  into Balance_date2  from dual;

  select Trunc(sysdate) into v_date from dual;

   create table risk_control.DPD_SUM&Balance_date2 as

   select * from risk_control.DPD_SUM;

end sp_bk_dpd_info_table;

以上procedure是有误的，望各位大侠告知。谢谢~~