DESCRIPTION:
In this article, we are going to see how to export and Import table space using Datapump.
Tablespaces are the logical storage units which are used by the database to store separate objects, such as tables, types, PL/SQL code, and so on. Typically, related objects are grouped together and stored in the same tablespace.
Using expdp export utility of data pump we can export tablespaces. Exporting tablespace is also a way of taking logical backup of the tablespace of your database. Exporting tablespace means only the tables contained in a specified set of tablespace are unloaded along with its dependent objects.
Exporting tablespace means
- Only the tables contained in a specified set of tablespace are unloaded
- If a table is unloaded, then its dependent objects are also unloaded
- Tablespace export unloads both object metadata and Data.
DIRECTORY.
Create a directory anywhere in your system or on your network where expdp export utility can save the exported files such as dump files and log files.
TABLE SPACE:
Using this TABLESPACES parameter we can specify the list of tablespace names which you want to export. For example here I have specified USERS.
[oracle@oracle19c ~]$ expdp directory=My_Dir tablespaces=users dumpfile=tab00.dmp logfile=tabs00.log Export: Release 19.0.0.0.0 - Production on Mon Jan 25 09:22:37 2021 Version 19.3.0.0.0 Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved. Username: data Password: Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Starting "DATA"."SYS_EXPORT_TABLESPACE_01": data/******** directory=My_Dir tablespaces=users dumpfile=tab00.dmp logfile=tabs00.log Processing object type TABLE_EXPORT/TABLE/TABLE_DATA Processing object type TABLE_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER Processing object type TABLE_EXPORT/TABLE/TABLE Processing object type TABLE_EXPORT/TABLE/COMMENT Processing object type TABLE_EXPORT/TABLE/INDEX/INDEX . . exported "DATA"."TABLE01" 5.515 KB 5 rows Master table "DATA"."SYS_EXPORT_TABLESPACE_01" successfully loaded/unloaded ****************************************************************************** Dump file set for DATA.SYS_EXPORT_TABLESPACE_01 is: /u01/app/oracle/oradata/tab00.dmp Job "DATA"."SYS_EXPORT_TABLESPACE_01" successfully completed at Mon Jan 25 09:22:51 2021 elapsed 0 00:00:09
Export activity completed successfully.
[oracle@oracle19c ~]$ !sq sqlplus / as sysdba SQL*Plus: Release 19.0.0.0.0 - Production on Mon Jan 25 09:23:37 2021 Version 19.3.0.0.0 Copyright (c) 1982, 2019, Oracle. All rights reserved. Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.3.0.0.0 SQL> conn data/pump Connected. SQL> select * from table01; ID NAME ---------- ------------------------------ 1 aaa 2 bbb 3 ccc 4 ddd 5 eee
SQL> drop table table01; Table dropped. SQL> select * from Table01; select * from Table01 * ERROR at line 1: ORA-00942: table or view does not exist SQL> Disconnected from Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.3.0.0.0
Import the tablespaces using the Dumpfile
[oracle@oracle19c ~]$ impdp directory=My_Dir dumpfile=tab00.dmp logfile=tabs00.log Import: Release 19.0.0.0.0 - Production on Mon Jan 25 09:24:28 2021 Version 19.3.0.0.0 Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved. Username: data Password: Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Master table "DATA"."SYS_IMPORT_FULL_01" successfully loaded/unloaded Starting "DATA"."SYS_IMPORT_FULL_01": data/******** directory=My_Dir dumpfile=tab00.dmp logfile=tabs00.log Processing object type TABLE_EXPORT/TABLE/TABLE Processing object type TABLE_EXPORT/TABLE/TABLE_DATA . . imported "DATA"."TABLE01" 5.515 KB 5 rows Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER Job "DATA"."SYS_IMPORT_FULL_01" successfully completed at Mon Jan 25 09:24:36 2021 elapsed 0 00:00:03
Import Activity successfully completed.Now we can access the tablespaces.
[oracle@oracle19c ~]$ !sq sqlplus / as sysdba SQL*Plus: Release 19.0.0.0.0 - Production on Mon Jan 25 09:24:51 2021 Version 19.3.0.0.0 Copyright (c) 1982, 2019, Oracle. All rights reserved. Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.3.0.0.0 SQL> conn data/pump Connected. SQL> select * from table01; ID NAME ---------- ------------------------------ 1 aaa 2 bbb 3 ccc 4 ddd 5 eee
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