Sunday, July 13, 2008

Data pump Export (expdp) patt #1

Data Pump Export is a utility for unloading data and metadata into a set of operating system files called a dump file set. The dump file set can be imported only by the Data Pump Import utility. The dump file set can be imported on the same system or it can be moved to another system and
loaded there.

The dump file set is made up of one or more disk files that contain table data, database object metadata, and control information. The files are written in a proprietary, binary format.

Invoking Data Pump Export :
The Data Pump Export utility is invoked using the expdp command. The characteristics of the export operation are determined by the Export parameters you specify. These parameters can be specified either on the command line or in a parameter file.

Data Pump Export Interfaces: You can interact with Data Pump Export by using a command line, a parameter file, or an interactive-command mode.

1.Command-Line Interface: Enables you to specify most of the Export parameters directly on the command line. Parameters Available in Export's
Command-Line Mode



ParameterDescription
Default
attach
connects a client session to a current running data pump export job

content
filters what is export: data_only, metadata_only , all
all
directory
destination of log and dump files
data_pump_dir
dumpfile
name of the dump file

estimate
method used to estimate dump file size : blocks or statistics

estimate_only
Y/N. instruct data_pump whether data should be exported or estimated.
N
exclude
exclude objects and data from being exported.

filesize
maximum size of each dump file

flashback_scn
scn of the database to flash back to to during exported

flushback_time
timestamp of the database to flash back to to during exported
full
Y/N. export all data and metadata in a full mode export
N
help
Y/N. display a list of avillable commands and options
N
include
specify which objects and data will be exported

job_name
name of the job
system generated
logfile
name of log file
expdp.log
network_link
source database link for a data pump job exporting a remote database

nologfile
a Y/N flag used to suppress log file creation

parallel
set number of workers for the export job
1
parfile
name the parameter file to use

query
filters row from table during the export

schemas
name the schema to be exported for schema mode export

status
displays detailed status of the data pump job

tables
list of tables and partitions to be exported for table mode export

tablespace
list of tablespaces to export in tablespace mode

transport_full_check
Specifies whether the tablespaces being exported should be verified as a self-contained set.

transport_tablespaces
specifies a transportable tablespace mode export

version
specifies the version of the database.



please go to Part 2
Post a Comment