Oracle Sql Loader

The Definitive Guide

Jonathan Gennick, Sanjay Mishra

251 pages, parution le 01/05/2001

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Résumé

SQL*Loader is a ubiquitous tool in the Oracle world. It has been shipped with Oracle since at least Version 6 and continues to be supported and enhanced with each new version of Oracle, including Oracle8 and Oracle8i. The job of SQL*Loader is to load data from flat files into an Oracle database. It's optimized for loading large volumes of data, and is flexible enough to handle virtually any input format.

Almost every Oracle user has to use SQL*Loader at one time or another, and DBAs are frequently called upon to load data for the users in their organization. Despite SQL*Loader's wide availability and usage, few DBAs and developers know how to get the most out of it. Oracle SQL*Loader: The Definitive Guide has everything you need to know to put SQL*Loader to its best use: an introduction to SQL*Loader, a reference to all of its syntax options, and most importantly, step-by-step instructions for all the SQL*Loader tasks you'd want to perform—and maybe some you didn't realize you COULD perform.

You'll learn how to construct the necessary control files and load from different types of files containing different types of data (e.g., fixed-width data, delimited data, and data of various datatypes). You'll also learn how to validate data, load it selectively, transform it as it is loaded, and recover after failure. This book explains how to optimize SQL*Loader performance by adjusting the transaction size and using the new direct path option. It also covers the newest SQL*Loader features—the loading of large object (LOB) columns and the new object types (nested tables, varying arrays, and object tables).

Oracle SQL*Loader: TheDefinitive Guide is an indispensable resource for anyone who is new to SQL*Loader; a task-oriented learning tool for those who are already using it; and a quick reference for every user. If you want to take best advantage of an essential Oracle tool, you need this book.

Contents

Preface

1. Introduction to SQL*Loader
The SQL*Loader Environment
A Short SQL*Loader Example
SQL*Loader's Capabilities
Issues when Loading Data
Invoking SQL*Loader

2. The Mysterious Control File
Syntax Rules
The LOAD Statement
Command-Line Parameters in the Control File
Placing Data in the Control File

3. Fields and Datatypes
Field Specifications
Datatypes

4. Loading from Fixed-Width Files
Common Datatypes Encountered
Specifying Field Positions
Handling Anomalous Data
Concatenating Records
Nesting Delimited Fields

5. Loading Delimited Data
Common Datatypes Encountered
Example Data
Using Delimiters to Identify Fields
Common Issues with Delimited Data
Concatenating Records
Handling Nested Fields

6. Recovering from Failure
Deleting and Starting Over
Restarting a Conventional Path Load
Restarting a Direct Path Load

7. Validating and Selectively Loading Data
Handling Rejected Records
Selectively Loading Data

8. Transforming Data During a Load
Using Oracle's Built-in SQL Functions
Writing Your Own Functions
Passing Data Through Work Tables
Using Triggers
Performing Character Set Conversion

9. Transaction Size and Performance Issues
Transaction Processing in SQL*Loader
Commit Frequency and Load Performance
Commit Frequency and Rollback Segments
Performance Improvement Guidelines

10. Direct Path Loads
What is the Direct Path?
Performing Direct Path Loads
Data Saves
Loading Data Fields Greater than 64K
UNRECOVERABLE Loads
Parallel Data Loading

11. Loading Large Objects
About Large Objects
Considerations when Loading LOBs
Loading Inline LOBs
Loading LOBs from External Data Files
Loading BFILEs

12. Loading Objects and Collections
Loading Object Tables and Columns
Loading Collections
Using NULLIF and DEFAULTIF with an Object or a Collection

Index

L'auteur - Jonathan Gennick

Jonathan Gennick est administrateur de base de données Oracle. Il est aussi écrivain et éditeur. Il est l'auteur de Oracle SQL*Plus : The Definitive Guide, dont proviennent les informations de ce guide, et de plusieurs autres ouvrages sur Oracle.

L'auteur - Sanjay Mishra

Sanjay Mishra is a certified Oracle database administrator with more than nine
years of IT experience. For the past six years, he has been involved in the design,
architecture, and implementation of many mission-critical and decision support
databases. He has worked extensively in the areas of database architecture, database
management, backup/recovery, disaster planning, performance tuning, Oracle Parallel
Server, and parallel execution. He has a bachelor of science degree in electrical
engineering and a master of engineering degree in systems science and automation. He
can be reached at sanjay_mishra@i2.com.

Caractéristiques techniques

	PAPIER
Éditeur(s)	O'Reilly
Auteur(s)	Jonathan Gennick, Sanjay Mishra
Parution	01/05/2001
Nb. de pages	251
Format	17,7 x 23,3
Couverture	Broché
Poids	447g
Intérieur	Noir et Blanc
EAN13	9781565929487
ISBN13	978-1-56592-948-7