Import Export DMP database files in Oracle

Oracle Data Import Export IMP/EXP is equivalent to Oracle data restore and backup. The EXP command can export data from a remote database server to a local DMP file, and IMP commands the DMP file to be imported locally into a distant database server. With this feature, you can build two identical databases, one for testing and one for formal use.

Execution environment: can be executed in SQLPLUS.EXE or DOS (command line),

DOS can be performed because the install directory Ora81bin in Oracle 8i is set to the global path,

There are EXP.EXE and IMP.EXE files under this directory that are used to perform import export.

Oracle is written in Java, Sqlplus. EXE, EXP. EXE, IMP. EXE these two files may be packaged after the class file.

Sqlplus. EXE call EXP.EXE, IMP. EXE package, complete the import and export function.

The following is an example of an import export.

Data export:

1 completely export database test, user Name System Password Manager exported to D:daochu.dmp

Exp system/manager@test file=d:daochu.dmp full=y

2 Exporting a table from the system user in the database to the SYS user

Exp system/manager@test file=d:daochu.dmp owner= (System,sys)

3 Export the table inner_notify, Notify_staff_relat in the database

Exp aichannel/aichannel@testdb2 file= d:datanewsmgnt.dmp tables= (Inner_notify,notify_staff_relat)

4 Export the fields in the table table1 in the database filed1 with the data beginning with "00"

Exp system/manager@test file=d:daochu.dmp tables= (table1) query= "where filed1 like ' 0% '"

The above is commonly used for export, for compression, both with WinZip to DMP file can be very good compression.

You can also implement it by adding compress=y to the command below.

Import of data

1 Import the data from D:DAOCHU.DMP into the test database.

Imp system/manager@test file=d:daochu.dmp

Imp aichannel/aichannel@hust full=y file=file= d:datanewsmgnt.dmp ignore=y

There may be something wrong with it, because some tables already exist, and then it complains, and the table is not imported.

Just add ignore=y to the back.

2 Import the table table1 in D:daochu.dmp

Imp system/manager@test file=d:daochu.dmp tables= (table1)

Basically, the import export above is sufficient. In many cases, you should first delete the table completely and then import it.

Attention:

The operator must have sufficient permissions, and the permission is not sufficient for it to prompt.

Database can be connected to. You can use tnsping test to get the database test to connect.

Appendix I:

Actions to increase user access to import data

First, start sql*puls

Second, to System/manager landing

Third, create user username identified by password (if you have already created a user, this step can be omitted)

Four, GRANT create User,drop user,alter USER, create any VIEW,

DROP any view,exp_full_database,imp_full_database,

Dba,connect,resource,create Session to User name

V, run-cmd-into the directory where the DMP file resides,

Imp Userid=system/manager full=y file=*.dmp

or imp Userid=system/manager full=y file=filename.dmp

To execute the example:

F:workoracle_databackup>imp userid=test/test full=y file=inner_notify.dmp

Screen display

Import:release 8.1.7.0.0-production on Thursday February 16 16:50:05 2006

(c) Copyright to Oracle Corporation. All rights reserved.

Connect to: Oracle8i Enterprise Edition Release 8.1.7.0.0-production

With the partitioning option

Jserver release 8.1.7.0.0-production export files created by export:v08.01.07 through a regular path

Import in the ZHS16GBK character set and ZHS16GBK NCHAR character set has been completed

The export server uses the UTF8 NCHAR character set (possible ncharset conversions)

. Importing Aichannel objects to Aichannel

. . Importing table "Inner_notify" 4 rows are imported

Ready to enable constraints ...

The import was successfully terminated, but a warning appears.

Appendix II:

Oracle does not allow direct changes to the owner of the table, using Export/import to achieve this.

First set up Import9.par,

Then, when used, the commands are as follows: Imp Parfile=/filepath/import9.par

Examples of Import9.par are as follows:

Fromuser=tgpms

TOUSER=TGPMS2 (Note: The user who changes the table owner from Fromuser to Touser,fromuser and Touser can be different)

Rows=y

Indexes=y

Grants=y

Constraints=y

buffer=409600

File==/backup/ctgpc_20030623.dmp

Log==/backup/import_20030623.log