Chinaunix首页 | 论坛 | 博客
  • 博客访问: 5361592
  • 博文数量: 1144
  • 博客积分: 11974
  • 博客等级: 上将
  • 技术积分: 12312
  • 用 户 组: 普通用户
  • 注册时间: 2005-04-13 20:06
文章存档

2017年(2)

2016年(14)

2015年(10)

2014年(28)

2013年(23)

2012年(29)

2011年(53)

2010年(86)

2009年(83)

2008年(43)

2007年(153)

2006年(575)

2005年(45)

分类: LINUX

2010-11-21 15:19:07

Range partitioning

From Oracle FAQ

Jump to: ,

Range partitioning is a technique where ranges of data is stored separately in different sub-tables.

MAXVALUE is provided as a catch-all for values that exceed all ranges specified. Note that Oracle sorts greater than all other values, except MAXVALUE.

[] History

Range partitioning was introduced in .

[] Examples

Partition on a numeric value range:

CREATE TABLE emp (
   empno NUMBER(4), 
   ename VARCHAR2(30), 
   sal   NUMBER
) 
PARTITION BY RANGE(empno) (
  partition e1 values less than (1000)     tablespace ts1, 
  partition e2 values less than (2000)     tablespace ts2, 
  partition e3 values less than (MAXVALUE) tablespace ts3
); 

Partition on a VARCHAR2 string:

CREATE TABLE emp
( id        NUMBER(5)    PRIMARY KEY,
  name      VARCHAR2(50) NOT NULL,
  phone     VARCHAR2(15),
  email     VARCHAR2(100) )
PARTITION BY RANGE ( name )
     ( PARTITION p1 VALUES LESS THAN ('L')      TABLESPACE ts1,
       PARTITION p2 VALUES LESS THAN (MAXVALUE) TABLESPACE ts2 )

Time based range partitioning:

CREATE TABLE t1 (id NUMBER, c1 DATE)
PARTITION BY RANGE (c1)
  (PARTITION t1p1 VALUES LESS THAN (TO_DATE('2007-11-01', 'YYYY-MM-DD')),
   PARTITION t1p2 VALUES LESS THAN (TO_DATE('2007-12-01', 'YYYY-MM-DD')),
   PARTITION t1p3 VALUES LESS THAN (TO_DATE('2008-01-01', 'YYYY-MM-DD')),
   PARTITION t1p4 VALUES LESS THAN (MAXVALUE)
  );
Retrieved from ""
阅读(1813) | 评论(0) | 转发(0) |
给主人留下些什么吧!~~