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Grammar-like Functional Rules for Representing Query Optimization
Grammar-like Functional Rules for Representing Query Optimization

... As our fuocttooal notation suggests,the rule mechamsmstarts wrth the root STAR, whtch IS the “starttng state” of our grammar The root STAR has one or more alteroattve defnnttoos, each of which may reference other STARS, whtch m turn may reference other STARs, and so on top down uotti a STAR IS defin ...
Semantic Data Integration for Francisella tularensis novicida Proteomic and Genomic Data
Semantic Data Integration for Francisella tularensis novicida Proteomic and Genomic Data

... Rather than data integration in the traditional sense where overlapping data elements are resolved into one structure, genomic, transcriptomic and proteomic data need to be linked together using a scaffold that represents their relatedness. Semantic web technologies offer exactly this scaffold. Sinc ...
Efficient Use of the SAS/ACCESS Interfaces to INGRES® and Sybase®
Efficient Use of the SAS/ACCESS Interfaces to INGRES® and Sybase®

... There are four ways to access data via the engine so that it is retrieved in sorted order. First, use the SORT procedure with the OUT= option to read the data using the view descriptor and create a sorted SAS data set. This is an efficient method to use if the sorted data will be reused several time ...
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an introduction to deductive database and its query evalution
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... Transition from handling transactions in daily batches to systems that managed an on-line database that could capture transactions as they happened. ...
Data Resource Configuration
Data Resource Configuration

...  Start service container (Tomcat)  View the factory using a web/service browser – Causes factory to start up – Automatically registers with NationalBiologyRegistery ...
Slide: Temporal Databases
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... The idea for time normalization is the requirement that tuples be semantically independent of one another. By definition, a relation is a set; hence, its elements (tuples) must be independent of one another. In an unnormalized TVR, every tuple has incomplete information about the lifespan of its att ...
Android-Lecture15,16-DataStorageInSQLite
Android-Lecture15,16-DataStorageInSQLite

... Compares this instance with the specified object and indicates if they are equal. Gets a value. Gets a value and converts it to a Boolean. Gets a value and converts it to a Byte. Gets a value that is a byte array. Gets a value and converts it to a Double. Gets a value and converts it to a Float. Get ...
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... This directory contains all resources related to the application that are not in the document root of the application. This is where your web application deployment descriptor is located. Note that the WEB-INF directory is not part of the ...
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Vertex Installation ( Step By Step Guide)

... Data Source needs to schema(Appowner). You do not need to put in a Data Source, you can leave this blank. Just type User ID IFSAPP, Password, and database (TEST, for example). Click on CONNECT. Do not click on OK. A database connections dialog box should be displayed indicating that “All Databases w ...
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connecting to databases with asp.net

... types. For example, even though Access and Paradox are both relational database management systems, Access creates its database files in a proprietary format with an extension of .mdb, whereas Paradox creates its database files in a proprietary format with an extension of .db. Although both Paradox ...
JDBC Java Database Connectivity
JDBC Java Database Connectivity

... object that can be used to assemble and run SQL commands. The preparedStatement() creates an object that is associated with a predefined SQL command (the Statement object can be used for arbitrary statements – and can be reused for other SQL commands) – The getMetaData() method will return metadata ...
Tlak 99 - University of Southern California
Tlak 99 - University of Southern California

... The spatial equivalent “here” doesn’t have the above properties; the biggest difference between time and space is that time cannot be reused! ...
Computer Forensics
Computer Forensics

... • Create table for customer users: – Create the CUSTOMERS table – Insert rows into the CUSTOMERS table – Create three users for testing, VPD_CLERK1, VPD_CLERK2, and VPD_CLERK3 – Grant the necessary privileges on the CUSTOMERS table to use each test ...
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... EGEE NA4 Meeting - Catania, 09-11 January 2006 ...
Chapter 6: Integrity Constraints
Chapter 6: Integrity Constraints

... Then K1 and K2 form foreign keys on the relational schemas for E1 and E2 respectively. • Weak entity sets are also a source of referential integrity constraints. For, the relation schema for a weak entity set must include the primary key of the entity set on which it depends. ...
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... The Collector.TableSize table provides data space used, index space used, and rowcounts for every table, in every database, in every managed instance. For the most recent collection of table size data, query Collector.TableSizeCurrent. You can see an up to date list of all logins across all servers ...
The Relational Model
The Relational Model

... What should be done if an Enrolled tuple with a nonexistent student id is inserted? (Reject it!) What should be done if a Students tuple is deleted? ...
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... Delivering on ZLE The Zero Latency Enterprise removes knowledge and processing latencies. At the heart of the Zero Latency Enterprise is an active database with up-to-date data and up-to-date information on scheduling business processes. ...
The High Performance Sybase ASE DBA
The High Performance Sybase ASE DBA

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... Early database systems worried only about storing user data, and left program logic to other subsystems. Relational database systems added stored procedures and triggers as an afterthought -- for performance and convenience. Current database products let applications store and activate database syst ...
TPC Benchmarks
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... The result of 2+ years of development by the TPC Application models a wholesale supplier managing orders. Order-entry provides a conceptual model for the benchmark; underlying components are typical of any OLTP system. Workload consists of five transaction types. Users and database scale linearly wi ...
XML and The Relational Data Model
XML and The Relational Data Model

... It is a metalanguage used to represent and manipulate data elements Similar to HTML in structure, but XML is concerned with the description and representation of data, rather than with the way it is displayed. XML is derived from Standard Generalized Markup Language (SGML) ...
Chapter 2
Chapter 2

... Through the Web ...
< 1 ... 129 130 131 132 133 134 135 136 137 ... 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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