[Oracle] LOB introduces a relational database like Oracle and is better at dealing with structured data, so how does Oracle handle and store unstructured data?Lob (Large object) is used by Oracle to handle semi-structured and unstructured data, a large object data type that can store more than 4000 bytes of string, binary data. The LOB type has two types of lobs,
LOB stores data in the database as byte streams. Therefore, many internal LOB operations can be involved in transactions, or they can be backed up and restored just like normal data. Oracle8i supports three types of internal LOB: BLOB (binary data), CLOB (single-byte character data), and NCLOB (multi-byte country char
Oracle Database can be used to search or operate lob data in many ways. We all know that there are four large objects in Oracle Database: lobs, the four types are blob, clob, and bfile and nclob. The following is a brief introduction to the lob data type.
Blob: Binary lob,
example, the development of a set of official documents system, documents in the charts, attachments, such as binary files or extra long text will not be able to use ordinary characters or other types of data description, which requires the background database to store the ability of this data. This functionality is implemented using an Oracle LOB object.
An Oracle lob is a data type used to store large a
Overview
LOB represents large object data, including BLOB and CLOB two types, used to store large chunks of binary data, such as picture data, video data, etc., which are used to store long text data, such as forum post content, product description, and so on. It is noteworthy that: in different databases, the corresponding field types of large objects are not the same, such as DB2 corresponding
Transferred from: http://www.cnblogs.com/tengtao93/p/4984689.html1, LOB (Large Objects) Large object, is used to store a large number of binary and text data of a data type (a LOB field can store up to 4GB of data)--lob classification of two types: 1) internal lob; 2) external lob
In Oracle, fields of the lob (large object, large object) type are increasingly used. This type of field has a large capacity (up to 4 GB of data), and a table can have multiple fields of this type, which is flexible, applicable to business areas with a large data volume (e.g., archives, etc ). However, although the storage capacity of fields such as long and long raw is not small (up to 2 GB), a table can have only one field of this type, it is rarel
Match to store complex files, images, and videos, DB2 for os/390 Version 6 introduces LOB (Large object) technology to support a single LOB object less than 2G while allowing a single LOB column to store 65536 terabytes of data altogether. DB2 supports the following three types of LOB objects:BLOB (BInary Large object)
Dul10 restoration of oracle lob data
5.4 DUL test 5.4.1 of the LOB field prepare a table containing BLOB fields. The following shows how to import the LOB file from the operating system to the database. // CREATE a TABLE T_BLOB SQL> show userUSER is "HR" SQL> CREATE TABLE T_blob2 (3 image_id number, 4 file_nam
Tags: Oracle LOBLOB Large Object handling: is primarily a database field for storing large amounts of data, which can be stored 4G non-structured data of bytes . mainly introduces the character type and the storage of the binary file type LOB data, separately describes The storage of the binary type LOB data. a. Oraclein theLOBData Type Classification1 , divided by the type of data stored: ①Character type
LOB large Object processing: A database field primarily used to store large amounts of data, which can store up to 4G of unstructured data. Mainly introduces the storage of character type and binary file type LOB data, separately describes the binary type LOB data storage.
Classification of LOB data types in Oracle
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The following article describes how to export LOB data using the DB2 table operation technique. If you are interested in the correct operation procedure of exporting LOB data using the DB2 table operation technique, you can click to view the following articles. The following is a detailed description of the main content of the article.
For example, there is a table (USER_INFO) for employee information. This
Applies To:Oracle database-enterprise edition-version 8.1.5.0 and laterInformation in this document applies to any platform.GOALHow to release Temp LOB Segment that have been created explicitly or implicitly by Oracle for intermediate stages of Databa SE processing.SolutionPrior to 10.2.0.4=============Actually we have different kinds of temporary segments. Oracle often requires temporary work space for intermediate stages of database processing. Ther
Label:Converts a string to BLOB type data and writes to the server. 1, first use the To_clob function to turn the VARCHAR2 field into a CLOB field. 2 Use the C2B above function to turn clob into blobs. That is: C2B (To_clob (varchar2 field)) CREATE OR REPLACE FUNCTIONC2B (binchClobdefaultEmpty_clob ())RETURNBLOB--typecasts BLOB to CLOB (binary conversion)
isRes BLOB
This article mainly describes how to export LOB data using the table operation technique of DB2 database. If there is a table of employee information (USER_INFO. There are three fields in this table: employee ID, employee name, and employee ID card copy.
Because the size of the employee ID card copy is relatively large, the LOB data type is used in the database.
For example, there is a table (USER_INFO) fo
We describe how to export LOB data using the DB2 table operation technique in the hypothetical way. Suppose there is a table of employee information (USER_INFO. The table contains three fields: employee ID, employee name, and employee ID card copy. Because the size of the employee ID card copy is relatively large, the LOB data type is used in the database.
For example, there is a table (USER_INFO) for emplo
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