Using Dblink to realize data pump remote data export

Using Dblink to realize data pump remote data export

A simple implementation of data in database A is derived using a data pump on a database B server.
The premise is that 2 data versions are consistent.

1. Create an export user on database B (as Administrator)
Sql> create user Daochub identified by Daochub;

2.1 Grant connection role, resource role to user
Sql> Grant Connect,resource to Daochub;
2.2 Authorizing the creation of data links
Sql> Grant Create table,create database link to Daochub;
or directly to the DBA role
Sql> Grant DBA to Daochub;

3. Create a directory on database B that holds the exported data
Sql> Create directory Dbdata as ' D:\export ';

4. Grant directory Read and Write permissions to users
Sql> Grant Read,write on the directory dbdata to Daochub;

5. Create Dblink as Daochu
Sql> CREATE DATABASE link Baklink
Connect to Daochua identified by "Daochua"
Using ' (DESCRIPTION =
(Address_list =
(ADDRESS = (PROTOCOL = TCP) (HOST = XX.) Xx. Xx. XX) (PORT = 1521))
)
(Connect_data =
(SERVER = dedicated)
(service_name = ORCL)
)
)‘;

Note:
The user name password used here is the user name and password in the remote database, the export is using this user, it must have the export permission,
If no authorization is required in database A;
Grant export permissions to user Daochua in database a
Sql> Grant Exp_full_database to Daochua;

6. Perform export (export data from user ' Daochu ' in database a)
CMD>EXPDP daochub/daochub network_link=baklink Schemas=daochua directory=dbdata dumpfile=exp%u.dmp;

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Using Dblink to realize data pump remote data export