oracle 10g admin workshops pptless 09

8/9/2019 Oracle 10g Admin workshops PPTLess 09

1/32

Copyright 2004, Oracle. All rights reserved.

Managing Data


2/32

9-2 Copyright 2004, Oracle. All rights reserved.

Objectives

Aftercompleting thislesson, youshouldbe able todo

thefollowing:

Manipulatedata through SQL

Use Data Pump toexport data

Use Data Pump to import data

Loaddata with SQL Loader


3/32


Manipulating Data Through SQL

SQL> INSERT INTO employees VALUES2 (9999,'Bob','Builder','[email protected]',NULL,SYSDATE,3 'IT_PROG',NULL,NULL,100,90);

1 row created.

SQL> UPDATE employees SET SALARY=6000

2 WHERE EMPLOYEE_ID = 9999;

1 row updated.

SQL> DELETE from employees2 WHERE EMPLOYEE_ID = 9999;

1 row deleted.


4/32


TheINSERT Command

Createonerow at a time.

Insert many rowsfrom anothertable.


5/32


TheUPDATE Command

Use tochange zeroormorerowsofa table.


6/32


TheDELETE Command

Use toremove zeroormorerowsfrom a table.


7/32


TheCOMMIT andROLLBACKCommands

Used tofinish a transaction.

Commit: Makes thechangepermanent

Rollback: Undoes thechange


8/32


Integrity Constraints and DML


9/32


Data Pump Export


10/32


Data Pump Export

Full Notes Page


11/32


Data PumpImport


12/32


Data PumpImport

Full Notes Page


13/32


DIRECTORY Objects

SQL>CREATE DIRECTORY dpump_dir12 AS '/usr/apps/datafiles';

Directory created.

SQL> SELECT * FROM DBA_DIRE

CTORIES2 WHERE DIRECTORY_NAME = 'DPUMP_DIR1';

OWNER DIRECTORY_NAME DIRECTORY_PATH------- --------------- --------------------SYS DPUMP_DIR1 /usr/apps/datafiles


14/32


SQL*Loader

Input

data files

Control

File

SQL*LoaderLog

fileBad

files

Discard

files

Tables and indexes


15/32


SQL*Loader

Full Notes Page


16/32


The SQL*LoaderControl File

Theloadercontrolfile tells SQL*Loader:

Where tofind theloaddata

Thedata format

Configuration details:

Memory management

Recordrejection

Interruptedload handling details

How tomanipulate thedata


17/32



Full Notes Page


18/32



Full Notes Page


19/32


Control File SyntaxConsiderations

Thesyntax isfree-format.

Syntax is not casesensitive.

Commentsextendfrom the two hyphens (--) that

mark thebeginning ofthecomment to theendoftheline.

TheCONSTANT keyword isreserved.


20/32


Input Data and Data Files

SQL*Loaderreadsdata fromoneormorefiles

specified in thecontrolfile.

From SQL*Loadersperspective, thedata in the

data file isorganized asrecords. Adata filecan be in oneof threeformats:

Fixed-recordformat

Variable-recordformat

Stream-recordformat


21/32



Full Notes Page


22/32



Full Notes Page


23/32


Loading Methods

ConventionalDirectpath

Array

insert

Block

writes

Table

SGA

High-watermark


24/32


Loading Methods

Full Notes Page


25/32


Comparing Direct andConventional

Path Loads

Conventional Load

UsesCOMMIT tomake

changespermanent

Redoentries alwaysgenerated

Enforces allconstraints

INSERT triggersfire

Can load intoclustered

tables

Otheruserscan make

changes to tables

Direct Path Load

Usesdata saves

Generatesredoonly underspecificconditions

Enforcesonly PRIMARY KEY,UNIQUE, andNOT NULL

INSERT triggersdo not fire

Cannot load into

clustered tables

Otheruserscannot

makechanges to tables


26/32


Comparing Direct andConventional

Path Loads- Full Notes Page


27/32


Loading Data with SQL*Loader


28/32


Loading Data with SQL*Loader

Full Notes Page


29/32


Summary

In thislesson, youshould havelearned how to:

Manipulatedata through SQL

Use Data Pump toexport data

Use Data Pump to import data

Loaddata with SQL Loader


30/32


Practice 9:

Using Data Pump Export andImport

Thispracticecovers thefollowing:

Creating a directory object

Extracting theHR schema objects

Using Data Pump import toload tables into adifferent schema


31/32


Practice 9 Using Data Pump Export and

Import - Full Notes Page


32/32


oracle 10g admin workshops pptless 09

Documents