oracle超大数据库表分区只复合分区表（范围散列分区表）-优快云博客

本文介绍了如何使用SQL语句创建一个分数记录表，并通过分区和子分区来优化查询效率。该表包括学号、姓名、宿舍号及成绩字段，并采用范围分区与哈希子分区相结合的方式进行数据组织。此外，还演示了数据插入过程及如何针对不同分区和子分区进行选择查询。

  create table graderecord04  
  (   
     sno varchar2(10),   
   sname varchar2(20),   
   dormitory varchar2(3),   
    grade int  
   )   
   partition by range(grade)   
  subpartition by hash(sno,sname)   
  (   
    partition p1 values less than(75)   
               (   
                 subpartition sp1  tablespace test01,subpartition sp2  tablespace test02  ------指定表空间的地方
               ),   
     partition p2 values less than(maxvalue)   
              (   
                  subpartition sp3 tablespace test02,subpartition sp4 tablespace test03    -------指定表空间的地方
               ) 
   );

SQL> create table graderecord04
2 (
3 sno varchar2(10),
4 sname varchar2(20),
5 dormitory varchar2(3),
6 grade int
7 )
8 partition by range(grade)
9 subpartition by hash(sno,sname)
10 (
11 partition p1 values less than(75)
12 (
13 subpartition sp1 tablespace test01,subpartition sp2 tablespace test02
14 ),
15 partition p2 values less than(maxvalue)
16 (
17 subpartition sp3 tablespace test02,subpartition sp4 tablespace test03
18 )
19 );

Table created.

SQL>

insert into graderecord04 values('511601','魁','229',92);
insert into graderecord04 values('511602','凯','229',62);
insert into graderecord04 values('511603','东','229',26);
insert into graderecord04 values('511604','亮','228',77);
insert into graderecord04 values('511605','敬','228',47);
insert into graderecord04(sno,sname,dormitory) values('511606','峰','228');
insert into graderecord04 values('511607','明','240',90);
insert into graderecord04 values('511608','楠','240',100);
insert into graderecord04 values('511609','涛','240',67);
insert into graderecord04 values('511610','博','240',75);
insert into graderecord04 values('511611','铮','240',60);
insert into graderecord04 values('511612','狸','244',72);
insert into graderecord04 values('511613','杰','244',88);
insert into graderecord04 values('511614','萎','244',19);
insert into graderecord04 values('511615','猥','244',65);
insert into graderecord04 values('511616','丹','244',59);
insert into graderecord04 values('511617','靳','244',95);

select * from graderecord04 partition(p1);
select * from graderecord04 partition(p2);
select * from graderecord04 subpartition(sp1);
select * from graderecord04 subpartition(sp2);
select * from graderecord04 subpartition(sp3);

SQL> select * from graderecord04;

SNO SNAME DOR GRADE
---------- -------------------- --- ----------
511602 ??? 229 62
511605 ??? 228 47
511609 ??? 240 67
511612 ??? 244 72
511614 ??? 244 19
511615 ??? 244 65
511602 ??? 229 62
511605 ??? 228 47
511609 ??? 240 67
511612 ??? 244 72
511614 ??? 244 19

SNO SNAME DOR GRADE
---------- -------------------- --- ----------
511615 ??? 244 65
511603 ??? 229 26
511611 ??? 240 60
511616 ??? 244 59
511603 ??? 229 26
511611 ??? 240 60
511616 ??? 244 59
511604 ??? 228 77
511606 ??? 228
511607 ??? 240 90
511613 ??? 244 88

SNO SNAME DOR GRADE
---------- -------------------- --- ----------
511604 ??? 228 77
511606 ??? 228
511607 ??? 240 90
511613 ??? 244 88
511601 ??? 229 92
511608 ??? 240 100
511610 ??? 240 75
511617 ??? 244 95
511601 ??? 229 92
511608 ??? 240 100
511610 ??? 240 75

SNO SNAME DOR GRADE
---------- -------------------- --- ----------
511617 ??? 244 95

34 rows selected.

SQL> select * from graderecord04 partition(p1);

SNO SNAME DOR GRADE
---------- -------------------- --- ----------
511615 ??? 244 65
511603 ??? 229 26
511611 ??? 240 60
511616 ??? 244 59
511603 ??? 229 26
511611 ??? 240 60
511616 ??? 244 59

18 rows selected.

SQL> select * from graderecord04 partition(p2);

SNO SNAME DOR GRADE
---------- -------------------- --- ----------
511604 ??? 228 77
511606 ??? 228
511607 ??? 240 90
511613 ??? 244 88
511604 ??? 228 77
511606 ??? 228
511607 ??? 240 90
511613 ??? 244 88
511601 ??? 229 92
511608 ??? 240 100
511610 ??? 240 75

SNO SNAME DOR GRADE
---------- -------------------- --- ----------
511617 ??? 244 95
511601 ??? 229 92
511608 ??? 240 100
511610 ??? 240 75
511617 ??? 244 95

16 rows selected.

SQL> select * from graderecord04 subpartition(sp1);

SNO SNAME DOR GRADE
---------- -------------------- --- ----------
511615 ??? 244 65

12 rows selected.

SQL> select * from graderecord04 subpartition(sp2);

SNO SNAME DOR GRADE
---------- -------------------- --- ----------
511603 ??? 229 26
511611 ??? 240 60
511616 ??? 244 59
511603 ??? 229 26
511611 ??? 240 60
511616 ??? 244 59

6 rows selected.

SQL> select * from graderecord04 subpartition(sp3);

8 rows selected.

SQL> select * from graderecord04 subpartition(sp4);

SNO SNAME DOR GRADE
---------- -------------------- --- ----------
511601 ??? 229 92
511608 ??? 240 100
511610 ??? 240 75
511617 ??? 244 95
511601 ??? 229 92
511608 ??? 240 100
511610 ??? 240 75
511617 ??? 244 95

8 rows selected.

SQL>