--列表分割槽create table student(
sid number,
sname varchar2(20),
province varchar2(20)
)partition by list(province)(
partition north values('河南','安徽','河北','山東'),
partition south values('廣東','海南','廣西','江西'),
partition west values('新疆','青海','寧夏','山西'),
partition east values('上海','浙江','江蘇'),
partition p1 values('湖北','湖南','重慶','四川')
)insert into student (sid,sname,province)values(1,'wenwen','河南');
insert into student (sid,sname,province)values(2,'hehe','河北');
insert into student (sid,sname,province)values(3,'qiuqiu','河南');
insert into student (sid,sname,province)values(4,'tuanzi','重慶');
insert into student (sid,sname,province)values(5,'yaoguai','湖南');
insert into student (sid,sname,province)values(6,'方圓','青海');
insert into student (sid,sname,province)values(7,'娥娥','海南');
insert into student (sid,sname,province)values(8,'哥哥','河南');
select * from student partition(north);
--復合分割槽--先按成績範圍分割槽 0-60， 60-80 雜湊分割槽
create table grades(
sno number,
sname varchar2(20),
grade number
)partition by range(grade)
subpartition by hash(sno,sname)
( partition p1 values less than (60)(
subpartition sp1,
subpartition sp2
),partition p2 values less than (80)(
subpartition sp3,
subpartition sp4
));insert into grades(sno,sname,grade)values(1,'wenwen',70);
insert into grades(sno,sname,grade)values(2,'huahua',70);
insert into grades(sno,sname,grade)values(3,'baibai',30);
insert into grades(sno,sname,grade)values(4,'hehe',59);
insert into grades(sno,sname,grade)values(5,'jiayou',57);
insert into grades(sno,sname,grade)values(6,'keai',29);
insert into grades(sno,sname,grade)values(7,'bajie',60);
insert into grades(sno,sname,grade)values(8,'jiujiu',70);
insert into grades(sno,sname,grade)values(9,'wowo',37);
insert into grades(sno,sname,grade)values(10,'haha',78);
insert into grades(sno,sname,grade)values(11,'dudu',54);
insert into grades(sno,sname,grade)values(12,'heihei',70);
insert into grades(sno,sname,grade)values(13,'eee',64);
--insert into grades(sno,sname,grade)values(14,'manman',99);
select * from grades;
select * from grades partition(p1);
select * from grades partition(p2);
--查詢子分割槽的資訊select * from grades subpartition(sp1);
select * from grades subpartition(sp2);
--查詢當前使用者所有的表分割槽資訊
select * from user_tab_partitions;
--查詢子分割槽資訊
select * from user_tab_subpartitions;
--發現值沒有對應的範圍分割槽 新增乙個分割槽
alter table grades add partition p3 values less than (100);
alter table grades add partition p4 values less than (maxvalue);
--分割槽裡面沒有值 需要刪除此分割槽
alter table grades drop partition p4;
--分割槽裡面的資料沒有意義，不刪除分割槽，只刪除資料
alter table grades truncate partition p3;
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