Oracle分区之四：分区维护和管理

一，分区表的相关实验 创建一个列表分区表 create table t3(id number,city varchar2(10)) partition by list(city) ( partition p1 values ('SH','JS','ZJ') , partition p2 values ('BJ','TJ','HB') , partition p3 values ('GZ','SZ') , partition p_othe

一，分区表的相关实验
创建一个列表分区表
create table t3(id number,city varchar2(10))
partition by list(city)
(
partition p1 values ('SH','JS','ZJ') ,
partition p2 values ('BJ','TJ','HB') ,
partition p3 values ('GZ','SZ') ,
partition p_others values (default)
);
create or replace procedure proc1
as
begin
for i in 1..1000
loop
execute immediate
'INSERT INTO T3 values(:x,:y)' USING i,'SH';
end loop;
end;
/
exec proc1
create or replace procedure proc1
as
begin
for i in 1001..2000
loop
execute immediate
'INSERT INTO T3 values(:x,:y)' USING i,'JS';
end loop;
end;
/
exec proc1
create or replace procedure proc1
as
begin
for i in 2001..3000
loop
execute immediate
'INSERT INTO T3 values(:x,:y)' USING i,'ZJ';
end loop;
end;
/
exec proc1
create or replace procedure proc1
as
begin
for i in 3001..4000
loop
execute immediate
'INSERT INTO T3 values(:x,:y)' USING i,'BJ';
end loop;
end;
/
exec proc1
create or replace procedure proc1
as
begin
for i in 4001..5000
loop
execute immediate
'INSERT INTO T3 values(:x,:y)' USING i,'TJ';
end loop;
end;
/
exec proc1
create or replace procedure proc1
as
begin
for i in 5001..6000
loop
execute immediate
'INSERT INTO T3 values(:x,:y)' USING i,'GZ';
end loop;
end;
/
exec proc1
create or replace procedure proc1
as
begin
for i in 6001..7000
loop
execute immediate
'INSERT INTO T3 values(:x,:y)' USING i,'HB';
end loop;
end;
/
exec proc1
create or replace procedure proc1
as
begin
for i in 7001..8000
loop
execute immediate
'INSERT INTO T3 values(:x,:y)' USING i,'SZ';
end loop;
end;
/
exec proc1
create or replace procedure proc1
as
begin
for i in 8001..10000
loop
execute immediate
'INSERT INTO T3 values(:x,:y)' USING i,'AH';
end loop;
end;
/
exec proc1
SQL> SET linesize 200
SQL> select TABLE_NAME, TABLE_OWNER, PARTITION_NAME, SUBPARTITION_COUNT from dba_tab_partitions where table_name='T3';
TABLE_NAME TABLE_OWNER PARTITION_NAME SUBPARTITION_COUNT
------------------------------ ------------------------------ ------------------------------ ------------------
T3 HR P1 0
T3 HR P2 0
T3 HR P3 0
T3 HR P_OTHERS 0

 

实验一(SPLIT 分区)
alter table t3 split partition p1 values ('JS') into
(partition p1_1,partition p1_2);
SQL> select TABLE_NAME, TABLE_OWNER, PARTITION_NAME, SUBPARTITION_COUNT from dba_tab_partitions where table_name='T3';
TABLE_NAME TABLE_OWNER PARTITION_NAME SUBPARTITION_COUNT
------------------------------ ------------------------------ ------------------------------ ------------------
T3 HR P1_1 0
T3 HR P1_2 0
T3 HR P2 0
T3 HR P3 0
T3 HR P_OTHERS 0

实验二(merge 分区)
alter table t3 merge partitions p1_1,p1_2 into partition p1;
SQL> select TABLE_NAME, TABLE_OWNER, PARTITION_NAME, SUBPARTITION_COUNT from dba_tab_partitions where table_name='T3';
TABLE_NAME TABLE_OWNER PARTITION_NAME SUBPARTITION_COUNT
------------------------------ ------------------------------ ------------------------------ ------------------
T3 HR P1 0
T3 HR P2 0
T3 HR P3 0
T3 HR P_OTHERS 0
实验三、
alter table t3 split partition p2 values ('BJ','TJ') into
(partition p2_1,partition p2_2);
SQL> select TABLE_NAME, TABLE_OWNER, PARTITION_NAME, SUBPARTITION_COUNT from dba_tab_partitions where table_name='T3';
TABLE_NAME TABLE_OWNER PARTITION_NAME SUBPARTITION_COUNT
------------------------------ ------------------------------ ------------------------------ ------------------
T3 HR P1 0
T3 HR P2_1 0
T3 HR P2_2 0
T3 HR P3 0
T3 HR P_OTHERS 0

 

实验四、
alter table t3 merge partitions p2_1,p2_2 into partition p2;
SQL> select TABLE_NAME, TABLE_OWNER, PARTITION_NAME, SUBPARTITION_COUNT from dba_tab_partitions where table_name='T3';
TABLE_NAME TABLE_OWNER PARTITION_NAME SUBPARTITION_COUNT
------------------------------ ------------------------------ ------------------------------ ------------------
T3 HR P1 0
T3 HR P2 0
T3 HR P3 0
T3 HR P_OTHERS 0
实验五( 向分区某个分区里增加个分区列值)
SQL> alter table t3 modify partition p3 add values('ZQ');
Table altered.
二，分区索引的相关实验
实验六(创建索引分区)
create index idx_t3 on t3(id)
global partition by range(id)
(
partition p1 values less than (1000),
partition p2 values less than (maxvalue)
);
drop index idx_3
create index idx_t3 on t3(id)
global partition by hash(id)
partitions 4;

create table tt2(id number,createdate date)
partition by range(createdate)
subpartition by hash(id) subpartitions 2
(
partition p1 values less than (to_date('2010-07-01','yyyy-mm-dd')),
partition p2 values less than (to_date('2011-01-01','yyyy-mm-dd'))
);

create table tt4(id number,name varchar2(10))
partition by range(name)
(
partition p1 values less than ('h'),
partition p2 values less than ('o')
);
create index idx_tt4 on tt4(id) local;
drop indexe idx_tt4 ;
create index idx_tt4 on tt4(id)
global partition by range(id)
(
partition p1 values less than (1000),
partition p2 values less than (maxvalue)
);
SQL> SET LINESIZE 200
SQL> select INDEX_OWNER, INDEX_NAME,PARTITION_NAME FROM dba_Ind_Partitions where index_name='IDX_TT4';
INDEX_OWNER INDEX_NAME PARTITION_NAME
------------------------------ ------------------------------ ------------------------------
HR IDX_TT4 P1
HR IDX_TT4 P2