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Oracle9i Application Developer`s Guide
Oracle9i Application Developer`s Guide

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... protocol is used with external tables to access data from Hadoop file systems. Starting with Greenplum Database 4.3.1, to upgrade to a different version of gphdfs, you must install the version of Greenplum Database that contains the version of gphdfs that you wish to use. For information about the g ...
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... data values. As an example of impreciseness in data values, consider the Employee(Name, Salary) database, where Salary of an employee, say John, may be known to the extent that it lies in the range $60,000-80,000, or may be known as John has a “high salary.” Similarly, as an example of impreciseness ...
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... data losses, but further inserts are going to produce an error, since the key has been used already. 21. Explain the difference between BOOL, TINYINT and BIT. - Prior to MySQL 5.0.3: those are all synonyms. After MySQL 5.0.3: BIT data type can store 8 bytes of data and should be used for binary data ...
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... relational, object-oriented, or object-relational database systems, which are designed and tuned for well-structured data. This thesis describes Lore, a new database management system we developed for storing and querying semistructured data. The overall architecture of the Lore system contains many ...
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... culture-specific information is brought together in a single environment, called a Global Language Support (GLS) locale. This manual assumes that you use the U.S. 8859-1 English locale as the default locale. The default is en_us.8859-1 (ISO 8859-1) on UNIX platforms or en_us.CP1252 (Microsoft 1252) ...
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... services that convert or transform XML documents. As we will see in the next few weeks, the ability to transform metadata both into new standards (e.g. EAD >> DC, MARC >> DC) and new document models (EAD >> PDF, EAD >> HTML) is an important function of information organization. Functions: A function ...
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... failed to answer the question. Masque also incorporates a domain-editor, which helps con gure the system for use in new knowledge domains. Until this project was carried out, Masque could only be used as a front-end to Prolog databases. The purpose of this project was to modify Masque, so that it c ...
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Embedded SQL Guide
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... Working with Data Supported datatypes . . . . . . . . . . . . . . . . . . . . . . . . 108 Understanding SQL expressions . . . . . . . . . . . . . . . . . 110 Using the string operator in expressions . . . . . . . . . 112 Using arithmetic operators in expressions . . . . . . . . 113 Using logical ope ...
< 1 ... 8 9 10 11 12 13 14 15 16 ... 492 >

Entity–attribute–value model

Entity–attribute–value model (EAV) is a data model to describe entities where the number of attributes (properties, parameters) that can be used to describe them is potentially vast, but the number that will actually apply to a given entity is relatively modest. In mathematics, this model is known as a sparse matrix. EAV is also known as object–attribute–value model, vertical database model and open schema.
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