Import correct dmp database files in Oracle Database

In fact, the actual import and export of Oracle Data imp/exp operations are similar to the actual Oracle data restoration and backup operations. We all know that the exp command can export relevant data from the remote Oracle database server to the local dmp file, and the imp command can import the dmp file from the local to the distant database server.

This function can be used to build two identical databases, one for testing and the other for formal use. Execution environment: it can be executed in SQLPLUS. EXE or doscommand line,

When DOS can be executed, the \ ora81 \ BIN installation directory in Oracle 8i is set to a global path,

The EXP. EXE and IMP. EXE files in this directory are used for import and export.

The Oracle database is written in java. The SQLPLUS. EXE, EXP. EXE, and IMP. EXE files may be packaged class files.

SQLPLUS. EXE calls the classes encapsulated by EXP. EXE and IMP. EXE to complete the Import and Export function. The following describes the Import and Export instances.

Data export:

1. Export the database TEST completely, and the username system Password manager is exported to D: \ daochu. dmp.

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

2. Export the tables of system users and sys users in the database

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

3. Export the inner_policy and policy_staff_relat tables in the database.

Exp aichannel/aichannel @ TESTDB2 file = d: \ data \ newsmgnt. dmp tables = (inner_policy, policy_staff_relat)

4. Export the data with the field filed1 in table 1 in the database starting with "00"

Exp system/manager @ TEST file = d: \ daochu. dmp tables = (table1) query = \ "where filed1 like '000000' \" is commonly used for export. For compression, you can use winzip to compress the dmp file.

You can also add compress = y to the command above. Data Import

1. import data from D: \ daochu. dmp to the TEST database.

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

Imp aichannel/aichannel @ HUST full = y file = d: \ data \ newsmgnt. dmp ignore = y

The above may be a problem, because some tables already exist, and then it will report an error, the table will not be imported.

Add ignore = y to the end.

2. Import table 1 in d: \ daochu. dmp

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

The preceding import and export operations are sufficient. In many cases, you must first completely delete the table and then import it. Note:

If the operator has sufficient permissions, a prompt is displayed.

Databases can be connected. You can use tnsping TEST to obtain whether the database TEST can be connected.

Appendix 1:

Add data import permissions to users

First, start SQL * puls

Second, log in with system/manager

Third, create user username identified by password. If you have already created a user, skip this step)

Fourth, 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 Username

Fifth, run-cmd-to enter the directory where the dmp file is located,

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

Or imp userid = system/manager full = y file = filename. dmp

Example:

 
 

  
  
F:\Work\Oracle_Data\backup>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 2000 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 the files created by EXPORT: V08.01.07 in the normal path

The ZHS16GBK Character Set and ZHS16GBK NCHAR character set have been imported.

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

Importing AICHANNEL object to AICHANNEL

Importing table "inner_policy" 4 rows

Prepare to enable constraints...

Import is terminated successfully, but a warning is displayed. Appendix 2:

Oracle databases cannot directly change the table owner. Export/Import can be used for this purpose.

First create import9.par,

The command is as follows:

 
 

  
  
imp parfile=/filepath/import9.par 
 
 

The content of import9.par is as follows:

 
 

  
  
FROMUSER=TGPMS 
  
  
TOUSER=TGPMS2 
  
  
ROWS=Y 
  
  
INDEXES=Y 
  
  
GRANTS=Y 
  
  
CONSTRAINTS=Y 
  
  
BUFFER=409600 
  
  
file==/backup/ctgpc_20030623.dmp  
  
  
log==/backup/import_20030623.log 
 
 

The above content is the description of the dmp database file imported to the Oracle database. I hope it will help you in this regard.