关于分区增强操作
Author: Bo Tang1. 间隔分区主表：
create table t0_a (a number,
b varchar2(20),
constraint pk_t0_a primary key(b)
)
partition by range(a)
interval (10)
(partition p1 values less than (10)
);
2. 引用分区子表：
create table t0_b (aa number,
bb varchar2(20)not null,
cc date,
constraint fk_t0_b foreign key(bb) references t0_a on delete cascade
)
partition by reference (fk_t0_b);
3. 向扩展分区主表插入数据，向引用分区子表插入数据：
insert into t0_a values ( 1,'a');
insert into t0_a values ( 10,'b');
insert into t0_a values ( 20,'c');
commit;
select* from t0_a;
insert into t0_b values ( 100,'b',sysdate);
insert into t0_b values ( 200,'c',sysdate);
commit;
4. 查看数据字典：select* from user_tab_partitions where table_namein ('T0_A','T0_B');
5. 进行级联删除测试：
alter table t0_a truncate partition (p1) cascade;
select * from t0_b partition ( p1);
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