本儲存過程實現建立表和刪除表，並應用到日期函式sysdate,add_months,
pl/sql devoleper 8.0開發
create or replace procedure p_create_history_table
isv_sql string(31000) :='';
begin
for i in 1..2
loop
declare num number;
begin select count(1) into num from user_tables where table_name = 'onoffhist_'||to_char(add_months(sysdate,i),'yyyymm');
if num >0
then execute immediate 'drop table onoffhist_'||to_char(add_months(sysdate,i),'yyyymm');
end if;
end;
v_sql := v_sql||'
create table dtpgsis_onoff.onoffhist_'||to_char(add_months(sysdate,i),'yyyymm')
||'( id number(10,0) not null enable,
sn number(*,0),
datetime varchar2(20),
maxvalue float(126),
minvalue float(126),
value float(126),
constraint onoffhist_'||to_char(add_months(sysdate,i),'yyyymm')||' primary key(id)
using index pctfree 10 initrans 2 maxtrans 255
storage (initial 65536 next 1048576 minextents 1 maxextents 2147483645
pctincrease 0 freelists 1 freelist groups 1 buffer_pool default)
tablespace "dtpgsis_onoff" enable
)' ;
-- dbms_output.put_line(v_sql);
execute immediate v_sql;
end loop;
commit;
end;
遇到許可權問題參考此文解決http://www.itpub.net/viewthread.php?tid=413853&extra=&page=1
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