在生产系统中,因业务需求,56张表中清空54张表数据,另外两张表数据保留,数据量大约10G左右：
1.大部分人想法就是expdp/impdp,的确是这样，哈哈
2.rman
3.以下方法,move
虚拟机单表模拟如下：
[[email protected] ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Mon Nov 3 18:40:16 2014
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/orcl/system01.dbf
/u01/app/oracle/oradata/orcl/sysaux01.dbf
/u01/app/oracle/oradata/orcl/undotbs01.dbf
/u01/app/oracle/oradata/orcl/users01.dbf
创建表空间
SQL> create tablespace dahao datafile ‘/u01/app/oracle/oradata/orcl/dahao01.dbf‘ size 100m;
Tablespace created.
创建用户
SQL> create user dahao identified by dahao default tablespace dahao;
User created.
授权
SQL> grant dba to dahao;
Grant succeeded.
SQL> conn dahao/dahao
Connected.
SQL> show user
USER is "DAHAO"
创建测试表
SQL> create table dahao as select * from scott.emp;
Table created.
查看索引
SQL> select index_name from user_indexes;
no rows selected
创建索引
SQL> create index index_empno on dahao(empno) tablespace users;
Index created.
查看索引
SQL> select index_name from user_indexes;
INDEX_NAME
------------------------------
INDEX_EMPNO
创建表move的表空间
SQL> create tablespace yoon datafile ‘/u01/app/oracle/oradata/orcl/yoon01.dbf‘ size 100m;
Tablespace created.
将表设置只读模式
SQL> alter table dahao.dahao read only;
Table altered.
迁移表对应表空间
SQL> alter table dahao.dahao move tablespace yoon;
Table altered.
修改用户默认表空间
SQL> alter user dahao identified by dahao default tablespace yoon;
User altered.
查看表状态
SQL> select TABLE_NAME,TABLESPACE_NAME,READ_ONLY from dba_tables where owner=‘DAHAO‘ and table_name=‘DAHAO‘;
TABLE_NAME TABLESPACE_NAME REA
------------------------------ ------------------------------ ---
DAHAO YOON YES
SQL> show user
USER is "DAHAO"
SQL> select index_name from user_indexes;
INDEX_NAME
------------------------------
INDEX_EMPNO
查看索引状态,失效
SQL> select INDEX_NAME,TABLE_OWNER,TABLE_NAME,STATUS from user_indexes where index_name=‘INDEX_EMPNO‘;
INDEX_NAME TABLE_OWNER TABLE_NAME STATUS
------------------------------ ------------------------------ ------------------------------ --------
INDEX_EMPNO DAHAO DAHAO UNUSABLE
重建索引
SQL> alter index index_empno rebuild tablespace users;
Index altered.
查看用户默认表空间
SQL> select username,default_tablespace from dba_users;
DAHAO YOON
将表设置读写模式
SQL> alter table dahao read write;
Table altered.
查看表状态
SQL> select TABLE_NAME,TABLESPACE_NAME,READ_ONLY from dba_tables where owner=‘DAHAO‘ and table_name=‘DAHAO‘;
TABLE_NAME TABLESPACE_NAME REA
------------------------------ ------------------------------ ---
DAHAO YOON NO