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You're reading from  Advanced Oracle PL/SQL Developer's Guide (Second Edition) - Second Edition

Product typeBook
Published inFeb 2016
Reading LevelIntermediate
Publisher
ISBN-139781785284809
Edition2nd Edition
Languages
SQL
Tools
Oracle Database
Concepts
Database Administration
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Author (1)
Saurabh K. Gupta
Saurabh K. Gupta
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Saurabh K. Gupta

Saurabh K. Gupta is a seasoned database technologist with extensive experience in designing high performance and highly available database applications. His technology focus has been centered around Oracle Database architecture, Oracle Cloud platform, Database In-Memory, Database Consolidation, Multitenant, Exadata, Big Data, and Hadoop. He has authored the first edition of this book. He is an active speaker at technical conferences from Oracle Technology Network, IOUG Collaborate'15, AIOUG Sangam, and Tech Days. Connect with him on his twitter handle (or SAURABHKG) or through his technical blog www.sbhoracle. wordpress.com, with comments, suggestions, and feedback regarding this book.
Read more about Saurabh K. Gupta

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LOB data types in Oracle

Oracle provides four data types dedicated for declaring large objects, namely: BLOB, CLOB, NCLOB, and BFILE.

BLOB and CLOB

There are three types of internal LOB data types, namely:

  • BLOB: The Binary Large Object data type is used to store large binary files that cannot be logically broken down to data bits such as PDFs, images, audios or videos, and so on.

  • CLOB: The Character Large Object data type stores the single-byte character data in the database character set format. It supports fixed-width character formats.

  • NCLOB: The CLOB data type that can store national character set data and support varying width format character sets.

Note

Starting from Oracle 10g, Oracle can cast the CLOB data to the VARCHAR2 data implicitly.

BFILE

A BFILE is an SQL data type for the external LOB data type. It is the read-only data type that stores a locator for a binary file whose physical location is outside the Oracle Database. Deleting a BFILE column value (or setting it to NULL) will drop...

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Advanced Oracle PL/SQL Developer's Guide (Second Edition) - Second Edition
Published in: Feb 2016Publisher: ISBN-13: 9781785284809
© 2016 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Saurabh K. Gupta

Saurabh K. Gupta is a seasoned database technologist with extensive experience in designing high performance and highly available database applications. His technology focus has been centered around Oracle Database architecture, Oracle Cloud platform, Database In-Memory, Database Consolidation, Multitenant, Exadata, Big Data, and Hadoop. He has authored the first edition of this book. He is an active speaker at technical conferences from Oracle Technology Network, IOUG Collaborate'15, AIOUG Sangam, and Tech Days. Connect with him on his twitter handle (or SAURABHKG) or through his technical blog www.sbhoracle. wordpress.com, with comments, suggestions, and feedback regarding this book.
Read more about Saurabh K. Gupta

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