有时候,多么的希望ORACLE能够导出某个视图中的数据,然后通过这个视图来迁移需要的数据,现在ORACLE 12C通过expdp的views_as_tables来实现了该功能,把视图当作一个普通表从而导出数据,导入的时候直接和一个正常表一样,通过视图的导出,表的导入来实现相关需求
准备测试环境
SQL> SELECT * FROM V$VERSION;
BANNER CON_ID
-------------------------------------------------------------------------------- ----------
Oracle Database 12c Enterprise Edition Release 12.1.0.0.2 - 64bit 0
PL/SQL Release 12.1.0.0.2 0
CORE 12.1.0.0.2 0
TNS for Linux: Version 12.1.0.0.2 0
NLSRTL Version 12.1.0.0.2
SQL> create table t_lx as select * from v$log;
Table created.
SQL> create table t_xl as select * from v$logfile;
Table created.
SQL> create view v_xifenfei as
2 SELECT thread#,
3 a.sequence#,
4 a.group#,
5 TO_CHAR (first_change#, '9999999999999999') "SCN",
6 a.status,
7 MEMBER
8 FROM t_lx a, t_xl b
9 WHERE a.group# = B.GROUP#
10 ORDER BY a.sequence# DESC;
View created.
SQL> col member for a50
SQL> set lines 134
SQL> select * from v_xifenfei;
THREAD# SEQUENCE# GROUP# SCN STATUS MEMBER
---------- ---------- ---------- ----------------- ---------------- -------------------------------------------
1 30 3 391892 CURRENT /u01/app/oracle/oradata/xifenfei/redo03.log
1 29 2 377363 INACTIVE /u01/app/oracle/oradata/xifenfei/redo02.log
1 28 1 374892 INACTIVE /u01/app/oracle/oradata/xifenfei/redo01.log
expdp结合VIEWS_AS_TABLES导出视图
[oracle@xifenfei ~]$ expdp xff/xifenfei views_as_tables=v_xifenfei directory=data_pump_dir dumpfile=xifenfei.dmp Export: Release 12.1.0.0.2 on Sun Dec 16 07:56:48 2012 Copyright (c) 1982, 2012, Oracle and/or its affiliates. All rights reserved. Connected to: Oracle Database 12c Enterprise Edition Release 12.1.0.0.2 - 64bit With the Partitioning, OLAP, Data Mining and Real Application Testing options Starting "XFF"."SYS_EXPORT_TABLE_01":xff/******** views_as_tables=v_xifenfei directory=data_pump_dir dumpfile=xifenfei.dmp Estimate in progress using BLOCKS method... Processing object type TABLE_EXPORT/VIEWS_AS_TABLES/TABLE_DATA Total estimation using BLOCKS method: 16 KB Processing object type TABLE_EXPORT/VIEWS_AS_TABLES/TABLE . . exported "XFF"."V_XIFENFEI" 7.390 KB 3 rows Master table "XFF"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded ****************************************************************************** Dump file set for XFF.SYS_EXPORT_TABLE_01 is: /u01/app/oracle/admin/xifenfei/dpdump/xifenfei.dmp Job "XFF"."SYS_EXPORT_TABLE_01" successfully completed at Sun Dec 16 07:58:17 2012 elapsed 0 00:00:56
impdp导入数据
[oracle@xifenfei ~]$ impdp xff/xifenfei remap_table=v_xifenfei:v_xff directory=data_pump_dir dumpfile=xifenfei.dmp Import: Release 12.1.0.0.2 on Sun Dec 16 08:06:06 2012 Copyright (c) 1982, 2012, Oracle and/or its affiliates. All rights reserved. Connected to: Oracle Database 12c Enterprise Edition Release 12.1.0.0.2 - 64bit With the Partitioning, OLAP, Data Mining and Real Application Testing options Master table "XFF"."SYS_IMPORT_FULL_01" successfully loaded/unloaded Starting "XFF"."SYS_IMPORT_FULL_01":xff/******** remap_table=v_xifenfei:v_xff directory=data_pump_dir dumpfile=xifenfei.dmp Processing object type TABLE_EXPORT/VIEWS_AS_TABLES/TABLE Processing object type TABLE_EXPORT/VIEWS_AS_TABLES/TABLE_DATA . . imported "XFF"."V_XFF" 7.390 KB 3 rows Job "XFF"."SYS_IMPORT_FULL_01" successfully completed at Sun Dec 16 08:06:20 2012 elapsed 0 00:00:10
验证数据
SQL> COL OBJECT_NAME FOR A20
SQL> select object_type,object_name from user_objectS where object_name like 'V_X%';
OBJECT_TYPE OBJECT_NAME
----------------------- --------------------
VIEW V_XIFENFEI
TABLE V_XFF
SQL> col member for a50
SQL> set lines 134
SQL> select * from v_XFF;
THREAD# SEQUENCE# GROUP# SCN STATUS MEMBER
---------- ---------- ---------- ----------------- ---------------- --------------------------------------------
1 30 3 391892 CURRENT /u01/app/oracle/oradata/xifenfei/redo03.log
1 29 2 377363 INACTIVE /u01/app/oracle/oradata/xifenfei/redo02.log
1 28 1 374892 INACTIVE /u01/app/oracle/oradata/xifenfei/redo01.log
通过测试证明在12C中ORACLE的expdp/impdp可以实现导出视图数据,进入导入到[其他库]其他表中
