Query plan

Modern day's queries are posed on database spread across the globe, this may impose a challenge on processing queries efficiently, and a strategy is required to generate optimal query plans. In distributed relational database systems, due to partitioning or replication on relations at multiple sites, the relations required by a query to answer, may be stored at multiple sites. This leads to an exponential increase in the number of possible equivalent alternatives or query plans for a user query. Though

Ontologies of combining structured and unstructured data Proposal, Research Project Plan X to be presented on [presentation date] [Student Name] Option: XXXXXXXXXXXXXX Advisor: XXXXX This proposal is submitted to the Computer and Information Science faculty in partial fulfillment for the degree Master of Science in Computer and Information Science. TABLE OF CONTENTS 1. Introduction 1 1.1 Background RESEARCH 1 1.2 IDENTIFY THE PROBLEM AREA 1 2. REsearch APPROACH 2 2.1 HYPOTHESIS 2 2.2

A triplestore is a non-relational database that stores and retrieves triples using semantic queries. Triples store data and are imported and exported using the Resource Description Framework (RDF). A triple is a data entity comprising three components a subject, predicate and object that describe a set of data such as “We have shoes”. The subject is “We”, the predicate is “have” and the object is “shoes”. Triples provide an easy and flexible way of modeling data that is similar to how the human brain

Several options are in ASP.NET to maintain data on a per-page basis and an application-wide basis. The features are as follows: • View state • Control state • Hidden fields • Cookies • Query strings • Application state • Session state • Profile Properties View state, control state, hidden fields, cookies, and query strings all having data storage on the client in different ways. Application state, session state, and profile properties all save data on the server memory. All the above features have

not entirely accurate, to think of a URL as the name of a file on the World Wide Web because most URLs refer to a file on some machine on the network. However, remember that URLs also can point to other resources on the network, such as database queries and command output. Most people realize that a space is not allowed in a URL. However, it is also important to realize as the URL string can only contain alphanumeric characters and “!$-_+* '()”. Any other characters that are required in the URL must

in XML notation. It would therefore seem reasonable to assume that query RDF using an XML query language. However, this approach disregards the fact that RDF is not just an XML dialect, but has its own data model that is very different from the XML tree structure. However, most approaches define new languages for querying RDF data, which has the following shortcomings: Languages are difficult to integrate with SQL queries used in database applications, and incur inefficiency as

MOVING IMAGES DATA DICTIONARY 13 IMPLEMENTATION 16 RELATIONSHIP BETWEEN THE TABLES 22 PROTOTYPES OF USER INTERFACE 23 VERIFYING AND EVALUATING MY DESIGN 25 MOVING IMAGES 25 TESTING BUTTONS 26 TESTING THE QUERIES 29 TESTING REPORTS 34 REPORT BASED ON QUERIES 37 EVALUATION 42 ASSIGNMENT Moving Images operates a DVD library. The library has a large number of titles, each title having at least

been extensive research on the optimization of queries for Datalog (and its variants). The major interest has been the optimization of recursive queries. Ceri et al~\cite{ceri-gottlob-tanca-1989} provide an excellent summary of the field. The evaluation or comparison of optimization strategies is typified by Bancilhon and Ramakrishnan~\cite{br1986,br1988} who develop analytical cost models for the optimization strategies when applied to four queries (related to the parent and ancestor relations)

URL (Uniform Resource Locator): A URL is one type of Uniform Resource Identifier (URI) the generic term for all types of names and addresses that refer to objects on the World Wide Web. The term Web address is a synonym for a URL that uses the HTTP or HTTPS protocol. Uniform Resource Locators were characterized in Request for Comments (RFC) 1738 in 1994 by Tim Berners-Lee, the World Wide Web, and the URI working gathering of the Internet Engineering Task Force (IETF), as a result of coordinated

URL(Uniform Resource Locator): A URL which is an abbreviated form of Uniform Resource Locator is the unique address for a file that is accessible on the Internet. A common way to access any Website is by entering the URL in the address line of the Web browser. However, any file in the website can be specified in the URL to access the same, it can either be a home page of the website, an image file related to the website or even a program such as a common gateway interface application or Java Applet