查看表的大小；

select a.blocks,a.bytes,a.bytes/1024/1024 from user_segments a

where a.segment_name='B_M_DZYH_CUST_SIGN_FACT';

首先

create table TEST_1228 as select * from user_tables;

insert into TEST_1228? select * from TEST_1228 ;

insert into TEST_1228? select * from TEST_1228 ;

insert into TEST_1228? select * from TEST_1228 ;

insert into TEST_1228? select * from TEST_1228 ;

insert into TEST_1228? select * from TEST_1228 ;

commit;

查看表的空間大小:記錄為1

select a.blocks,a.bytes,a.bytes/1024/1024 from dba_segments a

where a.segment_name='TEST_1228'

刪除表

delete from TEST_1228?;

commit;

查看表的空間大小:記錄為2

select a.blocks,a.bytes,a.bytes/1024/1024 from dba_segments a

where a.segment_name='TEST_1228'

移動高水位：

alter table TEST_1228 enable row movement

alter table TEST_1228 shrink space

查看表的空間大小:記錄為3

select a.blocks,a.bytes,a.bytes/1024/1024 from dba_segments a

where a.segment_name='TEST_1228'

對比1，2，3結果，即可

總結

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