Oracle backup command to use instances

The oracle backup command is used for oracle backup and recovery. The following describes how to use the oracle backup command to implement oracle backup. We hope that you can have a deeper understanding of the oracle backup command.

Export exp user/PASSWORD @ odbc file = C: \ ***. dmp rows = N // do not save data;
Export exp user/PASSWORD @ odbc file = C: \ ***. DMP // Save the data;
Export exp user/PASSWORD @ odbc file = C: \ ***. DMP full = y // export all;

Import imp user/password @ odbc file = c: \ ***. dmp full = y ignore = y;

Importing and exporting Oracle Data imp/exp is equivalent to restoring and backing up oracle data. The exp command can export data from the remote database server.

To the local dmp file, the imp command can import the dmp file from the local to the database server in the distance. 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.
Oracle is written in java. 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 '201312 '\"

The above is a commonly used 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.
 

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