Oracle教程之管理表（七）--Oracle分区表及簇表的建立
1、分区表：（>2G)对大表进行优化 （Range Partitioning，List PartitioningHash Partitioning，Composite Partitioning）
――按range 建立分区表
1 create table sales_range
2 (salesman_id number(5),
3 salesman_name varchar2(30),
4 sales_amount number(10),
5 sales_date date)
6 partition by range(sales_date)――指定分区的指标
7 (partition p1 values less than(TO_DATE('04/01/2011','MM/DD/YYYY')) tablespace lx01,
8 partition p2 values less than(TO_DATE('07/01/2011','MM/DD/YYYY')) tablespace lx02,
9 partition p3 values less than(TO_DATE('10/01/2011','MM/DD/YYYY')) tablespace lx03,
10 partition p4 values less than(TO_DATE('01/01/2012','MM/DD/YYYY')) tablespace lx04)
11* enable row movement
SQL> /
Table created.
SQL> insert into sales_range values ( 1001,'tom',1000,'2011-02-01');
1 row created.
SQL> insert into sales_range values ( 1002,'jerry',1000,'2011-05-01');
1 row created.
SQL> insert into sales_range values ( 1003,'rose',1000,'2011-08-01');
1 row created.
SQL> insert into sales_range values ( 1004,'john',1000,'2011-01-01');
1 row created.
SQL> insert into sales_range values ( 1005,'john',1000,'2011-11-01');
1 row created.
SQL> select * from sales_range partition(p1);
SALESMAN_ID SALESMAN_NAME SALES_AMOUNT SALES_DATE
----------- --------------- ------------ -------------------
1001 tom 1000 2011-02-01 00:00:00
1004 john 1000 2011-01-01 00:00:00
SQL> select * from sales_range partition(p2);
SALESMAN_ID SALESMAN_NAME SALES_AMOUNT SALES_DATE
----------- --------------- ------------ -------------------
1002 jerry 1000 2011-05-01 00:00:00
SQL> select * from sales_range partition(p3);
SALESMAN_ID SALESMAN_NAME SALES_AMOUNT SALES_DATE
----------- --------------- ------------ -------------------
1003 rose 1000 2011-08-01 00:00:00
SQL> select * from sales_range partition(p4);
SALESMAN_ID SALESMAN_NAME SALES_AMOUNT SALES_DATE
----------- --------------- ------------ -------------------
1005 john 1000 2011-11-01 00:00:00
SQL> select * from sales_range;
SALESMAN_ID SALESMAN_NAME SALES_AMOUNT SALES_DATE
----------- --------------- ------------ -------------------
1001 tom 1000 2011-02-01 00:00:00
1004 john 1000 2011-01-01 00:00:00
1002 jerry 1000 2011-05-01 00:00:00
1003 rose 1000 2011-08-01 00:00:00
1005 john 1000 2011-11-01 00:00:0
2、簇：cluster （多表链接查询）【先建立簇，然后建立簇表，最后建立索引】
1)建立簇
SQL> create cluster dept_emp_clu(deptno number(3))
2 pctfree 20 pctused 60
3 size 500 tablespace lx01;
Cluster created.
2）建立簇表
SQL> create table department(
2 id number(3) primary key,
3 dname varchar(14),loc varchar2(13))
4 cluster dept_emp_clu(id);
Table created.
SQL> create table employee(
2 eno number(4) primary key,
3 ename varchar2(10),
4 job varchar2(9),
5 mgr number(4),
6 hiredate date,
7 sal number(7,2),
8 comm number(7,2),
9 dept_id number(3) references department)
10 cluster dept_emp_clu(dept_id);
Table created.
3）建立索引
SQL> create index dept_emp_idx on cluster dept_emp_clu ――在簇上建立索引，并将索引和簇放在不同的表空间
2 tablespace lx02;
Index created.
CUUG
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