expdp中提供了query參數，可以在需要按條件導出表中部分數據時使用，它的使用就像是在select語句中的where條件使用一樣。
數據庫版本
zx@ORCL>select * from v$version; BANNER -------------------------------------------------------------------------------- Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production PL/SQL Release 11.2.0.4.0 - Production CORE11.2.0.4.0Production TNS for Linux: Version 11.2.0.4.0 - Production NLSRTL Version 11.2.0.4.0 - Production
創建測試表
zx@ORCL>create table e1 (id number,name varchar2(20)); Table created. zx@ORCL>create table e2 (id number,birthday date); Table created.
插入測試數據
zx@ORCL>insert into e1 select level,lpad(level,20,'*') from dual connect by level <= 100; 100 rows created. zx@ORCL>commit; Commit complete. zx@ORCL>insert into e2 select level,sysdate-50+level from dual connect by level <= 100; 100 rows created. zx@ORCL>commit; Commit complete.
創建目錄
zx@ORCL>create directory dir as '/home/oracle/'; Directory created. zx@ORCL>host
測試使用query導出
注意：如果query條件在parfile中則不需要用'\'進行轉義
[oracle@rhel6 ~]$ expdp zx/zx directory=dir dumpfile=e1.dmp tables=zx.e1 query=zx.e1:\"where id<=50\" bash: =50": No such file or directory Export: Release 11.2.0.4.0 - Production on Thu Jul 21 14:23:11 2016 Copyright (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 Production With the Partitioning, OLAP, Data Mining and Real Application Testing options Starting "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_DATA Total estimation using BLOCKS method: 64 KB Processing object type TABLE_EXPORT/TABLE/TABLE . . exported "ZX"."E1" 6.757 KB 50 rows Master table "ZX"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded ****************************************************************************** Dump file set for ZX.SYS_EXPORT_TABLE_01 is: /home/oracle/e1.dmp Job "ZX"."SYS_EXPORT_TABLE_01" successfully completed at Thu Jul 21 14:23:26 2016 elapsed 0 00:00:11 exit
查詢scn號
zx@ORCL>select dbms_flashback.get_system_change_number from dual; GET_SYSTEM_CHANGE_NUMBER ------------------------ 2179047 zx@ORCL>select count(*) from e1; COUNT(*) ---------- 100
刪除部分數據
zx@ORCL>delete from e1 where id<20; 19 rows deleted. zx@ORCL>commit; Commit complete. zx@ORCL>host
測試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=2179047 Export: Release 11.2.0.4.0 - Production on Thu Jul 21 14:25:41 2016 Copyright (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 Production With the Partitioning, OLAP, Data Mining and Real Application Testing options Starting "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_DATA Total estimation using BLOCKS method: 64 KB Processing object type TABLE_EXPORT/TABLE/TABLE . . exported "ZX"."E1" 6.757 KB 50 rows Master table "ZX"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded ****************************************************************************** Dump file set for ZX.SYS_EXPORT_TABLE_01 is: /home/oracle/e1_1.dmp Job "ZX"."SYS_EXPORT_TABLE_01" successfully completed at Thu Jul 21 14:25:49 2016 elapsed 0 00:00:06 [oracle@rhel6 ~]$ exit exit
測試複雜query導出
zx@ORCL>select count(*) from e1 where id in( select id from e2 where birthday<sysdate); COUNT(*) ---------- 31 [oracle@rhel6 ~]$ expdp zx/zx directory=dir dumpfile=e1_2.dmp tables=zx.e1 query=zx.e1:\"where id in \( select id from e2 where birthday\<sysdate\)\" Export: Release 11.2.0.4.0 - Production on Thu Jul 21 14:31:04 2016 Copyright (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 Production With the Partitioning, OLAP, Data Mining and Real Application Testing options Starting "ZX"."SYS_EXPORT_TABLE_01": zx/******** directory=dir dumpfile=e1_2.dmp tables=zx.e1 query=zx.e1:"where id in ( select id from e2 where birthday<sysdate)" Estimate in progress using BLOCKS method... Processing object type TABLE_EXPORT/TABLE/TABLE_DATA Total estimation using BLOCKS method: 64 KB Processing object type TABLE_EXPORT/TABLE/TABLE . . exported "ZX"."E1" 6.242 KB 31 rows Master table "ZX"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded ****************************************************************************** Dump file set for ZX.SYS_EXPORT_TABLE_01 is: /home/oracle/e1_2.dmp Job "ZX"."SYS_EXPORT_TABLE_01" successfully completed at Thu Jul 21 14:31:12 2016 elapsed 0 00:00:06 [oracle@rhel6 ~]$ exit exit zx@ORCL>host
測試複雜query及flashback_scn導出
[oracle@rhel6 ~]$ expdp zx/zx directory=dir dumpfile=e1_3.dmp tables=zx.e1 query=zx.e1:\"where id in \( select id from e2 where birthday\<sysdate\)\" flashback_scn=2179047 Export: Release 11.2.0.4.0 - Production on Thu Jul 21 14:32:07 2016 Copyright (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 Production With the Partitioning, OLAP, Data Mining and Real Application Testing options Starting "ZX"."SYS_EXPORT_TABLE_01": zx/******** directory=dir dumpfile=e1_3.dmp tables=zx.e1 query=zx.e1:"where id in ( select id from e2 where birthday<sysdate)" flashback_scn=2179047 Estimate in progress using BLOCKS method... Processing object type TABLE_EXPORT/TABLE/TABLE_DATA Total estimation using BLOCKS method: 64 KB Processing object type TABLE_EXPORT/TABLE/TABLE . . exported "ZX"."E1" 6.757 KB 50 rows Master table "ZX"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded ****************************************************************************** Dump file set for ZX.SYS_EXPORT_TABLE_01 is: /home/oracle/e1_3.dmp Job "ZX"."SYS_EXPORT_TABLE_01" successfully completed at Thu Jul 21 14:32:14 2016 elapsed 0 00:00:06 [oracle@rhel6 ~]$ exit exit
刪除e2部分數據
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<sysdate); COUNT(*) ---------- 27
測試query及flashback_scn，結果只是對e1應用flashback_snc，e2沒有應用
zx@ORCL>host [oracle@rhel6 ~]$ expdp zx/zx directory=dir dumpfile=e1_4.dmp tables=zx.e1 query=zx.e1:\"where id in \( select id from e2 where birthday\<sysdate\)\" flashback_scn=2179047 Export: Release 11.2.0.4.0 - Production on Thu Jul 21 14:33:55 2016 Copyright (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 Production With the Partitioning, OLAP, Data Mining and Real Application Testing options Starting "ZX"."SYS_EXPORT_TABLE_01": zx/******** directory=dir dumpfile=e1_4.dmp tables=zx.e1 query=zx.e1:"where id in ( select id from e2 where birthday<sysdate)" flashback_scn=2179047 Estimate in progress using BLOCKS method... Processing object type TABLE_EXPORT/TABLE/TABLE_DATA Total estimation using BLOCKS method: 64 KB Processing object type TABLE_EXPORT/TABLE/TABLE . . exported "ZX"."E1" 6.648 KB 46 rows Master table "ZX"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded ****************************************************************************** Dump file set for ZX.SYS_EXPORT_TABLE_01 is: /home/oracle/e1_4.dmp Job "ZX"."SYS_EXPORT_TABLE_01" successfully completed at Thu Jul 21 14:34:03 2016 elapsed 0 00:00:06 [oracle@rhel6 ~]$ exit exit
使e1和e2都應用flashback_scn
zx@ORCL>select count(*) from e1 where id in( select id from e2 as of scn 2179047 where birthday<sysdate); COUNT(*) ---------- 31 zx@ORCL>host [oracle@rhel6 ~]$ expdp zx/zx directory=dir dumpfile=e1_5.dmp tables=zx.e1 query=zx.e1:\"where id in \( select id from e2 as of scn 2179047 where birthday\<sysdate\)\" flashback_scn=2179047 Export: Release 11.2.0.4.0 - Production on Thu Jul 21 14:39:52 2016 Copyright (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 Production With the Partitioning, OLAP, Data Mining and Real Application Testing options Starting "ZX"."SYS_EXPORT_TABLE_01": zx/******** directory=dir dumpfile=e1_5.dmp tables=zx.e1 query=zx.e1:"where id in ( select id from e2 as of scn2179047 where birthday<sysdate)" flashback_scn=2179047 Estimate in progress using BLOCKS method... Processing object type TABLE_EXPORT/TABLE/TABLE_DATA Total estimation using BLOCKS method: 64 KB Processing object type TABLE_EXPORT/TABLE/TABLE . . exported "ZX"."E1" 6.757 KB 50 rows Master table "ZX"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded ******************************************************************************
多個表使用query條件則使用','分開
[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 2016 Copyright (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 Production With the Partitioning, OLAP, Data Mining and Real Application Testing options FLASHBACK 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_DATA Total estimation using BLOCKS method: 384 KB Processing object type TABLE_EXPORT/TABLE/TABLE . . exported "ZX"."ABC" 5.898 KB 2 rows . . exported "ZX"."ABCE" 5.898 KB 2 rows Master table "SYSTEM"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded ****************************************************************************** Dump file set for SYSTEM.SYS_EXPORT_TABLE_01 is: /home/oracle/query.dmp Job "SYSTEM"."SYS_EXPORT_TABLE_01" successfully completed at Fri Dec 9 16:14:04 2016 elapsed 0 00:00:19