Moving data between Data bases

1. Group Members:
~Suhana Sultan. ~Aleena Farooq(GR)
~Maheen Yameen ~Maham Shahid

2.  Describe and use methods to move data
 SQL Loader, objects, External Tables
 Oracle data pump, use of data pump
 Export and Import of data

3.  Data moving is the process of transferring data from one storage system or
computing environment to another.
 It refers to the data transfer between different types of file formats, databases and
storage systems.

4.  It is the process of Moving data between two database engines.
 It requires careful planning and testing as there are number of sub tasks involved
in the process like storage capacity estimation of the target database, testing
application and ensuring data confidentially.

5. It involves the following 5 steps;
1)Scope identification
2) Data mapping
3) Option selection
4) Migration
5) Validation

7. Three techniques for moving a database:
1.detach and copy
2.take the database offline and copy the files
3.back up the database and restore it on the other server.

8.  Once a database is detached, no users can connect to it, the files are unlocked, and
you are free to copy the files to a new location.
 When you attach the database to a new SQL Server, you have the option of
changing the locations of the data and log files

9.  Taking the Database Offline:-
 You can choose to take a database offline and copy the files to a new location as a
method for moving the server.

10.  Like the attach and detach method, the backup and restore GUI and Transact-
SQL commands support changing the file locations to the new SQL Server
instance.
 After you’ve backed up the database to a disk file or to tape, you can then restore
it to the new database location.

11.  SQL*Loader is the primary method to load data from external flat files
(ASCII/TEXT/CSV) into tables of an Oracle Database.

12.  SQL*Loader works based on a control file, which specifies the location of data,
how data should be parsed and interpreted, and target table
 where data should be loaded. It also takes inputs from one or more datafiles,
which contain data to be loaded into the database.
 Output from SQL*Loader for a load session is a table where data is loaded, a log
file, and a bad file (with details of bad formatted records) or

14.  Can load data from multiple datafiles and into multiple tables during same load
session.
 Can perform remote data loading
 Selective data loading (load records based on record values)
 Supports complex object relational data.
 Supports both conventional and direct path loading
 Supports loading from non-Oracle database

15.  First Non-Oracle database will export the data into a pre-defined file format.
 SQL loader will read this file and load the data into Oracle database tables

16.  External table is a table that come from flat files stored on outside the database .
 The flat files are files that stored on OS level .

17.  So here is the Difference between SQL loader and external table
 If there are multiple primary input datafiles with SQL*Loader loads,
 a bad file
 and a discard file are created for each input datafile.
 With external table loads, there is only one bad file and one discard file for all
input datafiles.
 It is the read only data
 For modify come to the data File and do the modification

18.  Oracle Data Pump technology enables very high-speed movement of
data and metadata from one database to another.
 It is a Server-based technology.
 Oracle data pump is available in Orcale 10 g version and above.

20.  Enables high speed movement of bulk data and metadata.
 Simplest approach to export objects from one source to target.
 Enhanced version of original/legacy import and export utilities.
 Performed as a server side job.
 Hence more efficient ( unlike legacy exp/imp where dump file is created at the
client side/location)

21. There are several Oracle Data Pump methods that you can use to
move data in and out of databases. You can select the method that
best fits your use case.

22.  Data pump is a utility for unloading data and metadata into a set of OS files
called a “Dump File Set”.
 The dump file set can be imported only by the Data pump import utility.
 The Dump file can be imported on the same or as well as on the other system.
 The dump file set is made up of one or more disl files that contain table data,
metadata, and control information.

23.  DATAPUMP_EXP_FULL_DATABASE
 DATAPUMP_IMP_FULL_DATABASE

24.  CREATE DIRECTORY DIR_NAME AS ‘PATH’;
 GRANT READ WRITE ON DIR TO USER_NAME

25. 1) How many ways of moving data into database.
A)2. B)3 C)4 D) Many
2) Which version of oracle support Expdp/Impdp.
A) 8i. B) 11g C) 12c. D) 10g

26. ~ Practical work will be performed practically.
THANK YOU!