Oracle Data Pump Export may be a built-in utility for unloading data and metadata into a group of dump files. The dump file set then are often imported by the info Pump Import utility on an equivalent or another Oracle Database system.

The dump file set contains table data, database object metadata, and control information that are written in an Oracle-proprietary, binary format.

The Data Pump Export works on the server only, therefore, it typically deals with directory object that maps to physical directories on the database server. The Export Data Pump tool doesn’t write to the local filing system on your client computer.

Notice that Oracle introduced the info Pump Export utility starting in Oracle 10g. the info pump Export may be a replacement of the old Export utility. consistent with Oracle, the new Data Pump Export are often up to 40 times faster.

Here are some notable features of the Oracle Data Pump Export tool:

Compression of output files
Encryption
Export via network link
Parallelism
Using a subquery to export partial data.
Renaming tables/schemas/tablespaces

Calling Data Pump Export program

You invoke the info Pump Export program using the expdp command. The behaviors of the program are determined by the parameters specified either on the instruction or during a parameter file.

expdp

Oracle Data Pump Export example

First, create a replacement directory object ot_external that maps to the c:\export folder:

CREATE DIRECTORY ot_external AS ‘C:\export’;

Second, create a parameter file named customer.par with the subsequent contents and place the enter the C:\export directory:

ot@pdborcl/Abcd1234

directory=ot_external

dumpfile=customer_exp%U.dmp

logfile=customer_exp.log

filesize=50K

tables=customers

In this parameter file:

The first line specifies the user and password (customers.

Third, invoke the info Pump Export program to export the purchasers table to the dump files:

expdp parfile=customer.par

Here is that the dump file set:

Now, it’s your address export all objects within the OT schema to the dump files by creating a replacement parameter file with the subsequent contents:

ot@pdborcl/Abcd1234

directory=ot_external

dumpfile=ot_exp%U.dmp

logfile=ot_exp.log

filesize=50K

schemas=ot

And run this command: expdp parfile=ot.par

Oracle impdp

Introduction to Oracle Data Pump Import tool

The Data Pump Import program may be a tool that permits you to load an export dump file set into a target Oracle database system. the info Pump Import utility comes with the Oracle Installation by default.

The dump file set consists of 1 or more disk files that store table data, database object metadata, and control information. The dump file set is made by running the info Pump Export tool.

Note that the info Pump Import may be a replacement of the legacy Import tool called imp ranging from Oracle 10g. Oracle recommends the info Pump Import tool because it’s more flexible and may be 15 times faster than the legacy tool in terms of performance.

How to run the info Pump Import tool

To invoke the info Pump Import tool, you employ the subsequent command:

impdp

The behavior of the tool depends on the import parameters that you simply specify, either on the instruction or during a parameter file.

Oracle Data Pump Import tool example

We will load the dump file set exported within the Data Pump Export tutorial for the demonstration.

First, create a parameter file named customer_imp.par with the subsequent contents and place it within the c:\export folder:

ot@pdborcl/Abcd1234

directory=ot_external

dumpfile=customer_exp%U.dmp

logfile=customer_imp.log

remap_table=ot.customers:customers_bk

In this parameter file, the remap_table option renames the purchasers table to customers_bk table.

Then, use the impdp command to invoke the info Pump Import tool with the parameter file customer_imp.par:

impdp parfile=customer_imp.par

Finally, verify the contents of the customers_bk table:

SELECT * FROM customers;

Here is that the partial output:

In this blog, you’ve got learned the way to use the Oracle Data Pump Import tool to load an export dump file set into an Oracle Database system.

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