–1.普通分割槽指令碼 需要手動建立新分割槽
create table t_factor_value_2017
(
stat_month CHAR(6) not null,
channel_id CHAR(2) not null,
sales_id CHAR(7) not null,
branch_id CHAR(7),
version_id VARCHAR2(20)
)
partition by list (STAT_MONTH)
(
partition P202008 values (‘202008’),
partition P202009 values (‘202009’),
partition P202010 values (‘202010’),
partition P202011 values (‘202011’),
partition P202012 values (‘202012’),
partition PARTDEF values (default)
);
–2. 區間分割槽 解決手動建立新分割槽
create table empCYH
(empno number(4),
ename varchar2(20),
job varchar2(20),
hiredate date,
deptno number(2))
PARTITION BY RANGE (hiredate)
INTERVAL (NUMTOYMINTERVAL(1,‘YEAR’))
(PARTITION part_1999 VALUES LESS THAN
(TO_DATE(‘2000-01-01’,‘YYYY-MM-DD’)));
commit;

select a.*,a.rowid from empCYH a;

–3.系統分割槽 提供了一個額外的選項使得使用者可以完全控制資料存放的分割槽，建立本地索引會自動根據表的分割槽對索引進行分割槽。注意：必須要在插入資料的時候，告訴oracle要具體放在哪個分割槽。

create table sales
(sales_id number,
product_code number ,
state_code number)
partition by system
(partition p1 tablespace users,
partition p2 tablespace users);
create index in_sales_state on sales(state_code) local;

–操作
insert into sales partition(p1) values(1,101,1);
delete sales partition (p1) where state_code=‘1’;

–4.虛擬列分割槽 支援所有的基本分割槽策略
–比如所有賬戶號碼的前兩個數字代表銀行的分行，通過虛擬列分割槽進行分行的分割槽
create table accountsCYH
(acc_no number(10) not null,
acc_name varchar2(50) not null,
acc_branch number(2) generated always as
(to_number(substr(to_char(acc_no),1,2))))
partition by list (acc_branch)
(partition main_branch values(1),
partition NY_branch values(2),
partition chicago_branch values(4),
partition miami_branch values(11));

select a.*,a.rowid from accountsCYH a;

還原表空間擴容
–MM查詢表空間大小
select * from dba_data_files a where a.TABLESPACE_NAME = ‘UNDOTBS1’;
–MM給表空間大小擴容
alter tablespace UNDOTBS1 add datafile ‘/picclife/app/oracle/oradata/smis/undotbs02.dbf’ size 1000m autoextend on next 200m;

SELECT tablespace_name FROM dba_tablespaces WHERE contents=‘UNDO’;

------檢視還原表空間使用情況
select b.tablespace_name as “表空間”,
b.file_name as “物理檔名”,
b.bytes / 1024 / 1024 as “當前大小(M)”,
(b.bytes - sum(nvl(a.bytes, 0))) / 1024 / 1024 as “已使用(M)”,
substr((b.bytes - sum(nvl(a.bytes, 0))) / (b.bytes) * 100, 1, 5) as “使用率(%)”,
case b.autoextensible
when ‘YES’ then ‘是’
else ‘否’
end as “是否自增”,
b.maxbytes / 1024 / 1024 as “自增最大容量(M)”
from dba_free_space a, dba_data_files b
where a.file_id = b.file_id
and a.tablespace_name in (‘UNDOTBS1’)
group by b.tablespace_name, b.file_name, b.bytes, b.autoextensible, b.maxbytes
order by b.tablespace_name;

–參考地址：
/* http://blog.csdn.net/labixiaofeng/article/details/73483143 */