Oracle 11g expdp中query参数的使用

expdp中提供了query参数，可以在需要按条件导出表中部分数据时使用，它的使用就像是在select语句中的where条件使用一样。

数据库版本

zx@ORCL>select * from v$version;BANNER--------------------------------------------------------------------------------Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit ProductionPL/SQL Release 11.2.0.4.0 - ProductionCORE11.2.0.4.0ProductionTNS for Linux: Version 11.2.0.4.0 - ProductionNLSRTL Version 11.2.0.4.0 - Production

创建测试表

zx@ORCL>create table e1 (id number,name varchar2(20));Table created.zx@ORCL>create table e2 (id number,birthday date);Table created.

插入测试数据

zx@ORCL>insert into e1 select level,lpad(level,20,'*') from dual connect by level <= 100;100 rows created.zx@ORCL>commit;Commit complete.zx@ORCL>insert into e2 select level,sysdate-50+level from dual connect by level <= 100;100 rows created.zx@ORCL>commit;Commit complete.

创建目录

zx@ORCL>create directory dir as '/home/oracle/';Directory created.zx@ORCL>host

测试使用query导出

注意：如果query条件在parfile中则不需要用'\'进行转义

[oracle@rhel6 ~]$ expdp zx/zx directory=dir dumpfile=e1.dmp tables=zx.e1 query=zx.e1:\"where id<=50\"bash: =50": No such file or directoryExport: Release 11.2.0.4.0 - Production on Thu Jul 21 14:23:11 2016Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing optionsStarting "ZX"."SYS_EXPORT_TABLE_01":  zx/******** directory=dir dumpfile=e1.dmp tables=zx.e1 query=zx.e1:"where id<=50" Estimate in progress using BLOCKS method...Processing object type TABLE_EXPORT/TABLE/TABLE_DATATotal estimation using BLOCKS method: 64 KBProcessing object type TABLE_EXPORT/TABLE/TABLE. . exported "ZX"."E1"                                   6.757 KB      50 rowsMaster table "ZX"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded******************************************************************************Dump file set for ZX.SYS_EXPORT_TABLE_01 is:  /home/oracle/e1.dmpJob "ZX"."SYS_EXPORT_TABLE_01" successfully completed at Thu Jul 21 14:23:26 2016 elapsed 0 00:00:11exit

查询scn号

zx@ORCL>select dbms_flashback.get_system_change_number from dual;GET_SYSTEM_CHANGE_NUMBER------------------------ 2179047zx@ORCL>select count(*) from e1;  COUNT(*)----------       100

删除部分数据

zx@ORCL>delete from e1 where id<20;19 rows deleted.zx@ORCL>commit;Commit complete.zx@ORCL>host

测试query及flashback_scn

[oracle@rhel6 ~]$ expdp zx/zx directory=dir dumpfile=e1_1.dmp tables=zx.e1 query=zx.e1:\"where id\<=50\" flashback_scn=2179047Export: Release 11.2.0.4.0 - Production on Thu Jul 21 14:25:41 2016Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing optionsStarting "ZX"."SYS_EXPORT_TABLE_01":  zx/******** directory=dir dumpfile=e1_1.dmp tables=zx.e1 query=zx.e1:"where id<=50" flashback_scn=2179047 Estimate in progress using BLOCKS method...Processing object type TABLE_EXPORT/TABLE/TABLE_DATATotal estimation using BLOCKS method: 64 KBProcessing object type TABLE_EXPORT/TABLE/TABLE. . exported "ZX"."E1"                                   6.757 KB      50 rowsMaster table "ZX"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded******************************************************************************Dump file set for ZX.SYS_EXPORT_TABLE_01 is:  /home/oracle/e1_1.dmpJob "ZX"."SYS_EXPORT_TABLE_01" successfully completed at Thu Jul 21 14:25:49 2016 elapsed 0 00:00:06[oracle@rhel6 ~]$ exitexit

测试复杂query导出

zx@ORCL>select count(*) from e1 where id in( select id from e2 where birthdayhost

测试复杂query及flashback_scn导出

[oracle@rhel6 ~]$ expdp zx/zx directory=dir dumpfile=e1_3.dmp tables=zx.e1 query=zx.e1:\"where id in \( select id from e2 where birthday\
删除e2部分数据
zx@ORCL>delete from e2 where id>25 and id<30;4 rows deleted.zx@ORCL>commit;Commit complete.zx@ORCL>select count(*) from e1 where id in( select id from e2 where birthday
测试query及flashback_scn，结果只是对e1应用flashback_snc，e2没有应用
zx@ORCL>host[oracle@rhel6 ~]$ expdp zx/zx directory=dir dumpfile=e1_4.dmp tables=zx.e1 query=zx.e1:\"where id in \( select id from e2 where birthday\
使e1和e2都应用flashback_scn
zx@ORCL>select count(*) from e1 where id in( select id from e2 as of scn 2179047 where birthdayhost[oracle@rhel6 ~]$ expdp zx/zx directory=dir dumpfile=e1_5.dmp tables=zx.e1 query=zx.e1:\"where id in \( select id from e2  as of scn 2179047  where birthday\
多个表使用query条件则使用','分开
[oracle@rhel6 ~]$ expdp system/123456 directory=dump dumpfile=query.dmp tables=zx.abc,zx.abce query=zx.abc:\"where id \< 4\",zx.abce:\"where id \< 4\"Export: Release 11.2.0.4.0 - Production on Fri Dec 9 16:13:41 2016Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing optionsFLASHBACK automatically enabled to preserve database integrity.Starting "SYSTEM"."SYS_EXPORT_TABLE_01":  system/******** directory=dump dumpfile=query.dmp tables=zx.abc,zx.abce query=zx.abc:"where id < 4",zx.abce:"where id < 4" Estimate in progress using BLOCKS method...Processing object type TABLE_EXPORT/TABLE/TABLE_DATATotal estimation using BLOCKS method: 384 KBProcessing object type TABLE_EXPORT/TABLE/TABLE. . exported "ZX"."ABC"                                  5.898 KB       2 rows. . exported "ZX"."ABCE"                                 5.898 KB       2 rowsMaster table "SYSTEM"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded******************************************************************************Dump file set for SYSTEM.SYS_EXPORT_TABLE_01 is:  /home/oracle/query.dmpJob "SYSTEM"."SYS_EXPORT_TABLE_01" successfully completed at Fri Dec 9 16:14:04 2016 elapsed 0 00:00:19