• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Mapping RDF and RDF-Schema to the Entity Relationship Model
Mapping RDF and RDF-Schema to the Entity Relationship Model

... given that RDF and relational models have differing architectures, there is a significant challenge in storing RDF in the relational model [9, 24]. In order to bridge this gap in architectures, in this paper we look at a mapping of RDF to a data modeling visualization paradigm, the Entity Relationsh ...
Enterprise console
Enterprise console

Scripting Guide
Scripting Guide

... Portions of this software copyright © 1995-2002 Jean-loup Gailly and Mark Adler This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this s ...
CIS6930: CGI and Servlets
CIS6930: CGI and Servlets

l DBMS-II Lab Manual
l DBMS-II Lab Manual

... Use the CREATE TABLE statement to create one of the following types of tables: A relational table, which is the basic structure to hold user data. An object table, which is a table that uses an object type for a column definition. An object table is explicitly defined to hold object instances of a p ...
Select
Select

... Flora Flora EE CSIT Computational Science and Information Technology Fulay Fulay CS CSIT Computational Science and Information Technology ...
The SQL SELECT Statement
The SQL SELECT Statement

... The TOP clause is used to specify the number of records to return. The TOP clause can be very useful on large tables with thousands of records. Returning a large number of records can impact on performance. Note: Not all database systems support the TOP clause. ...
Storing XML using Relational Model
Storing XML using Relational Model

... Traditional relational databases are typically better at dealing with data centric requirements. (2) ...
Ajax and DB
Ajax and DB

... Escapes special characters in the unescaped_string , taking into account the current character set of the connection so that it is safe to place it in a mysql_query(). If binary data is to be inserted, this function must be used. mysql_real_escape_string() calls MySQL's library function mysql_real_e ...
lecture 5
lecture 5

... • After you login into SQL*Plus, at the SQL prompt, you can begin typing any SQL command. • Upon hitting return (i.e., enter key) the SQL prompt will change to line number prompts. • When you are finished typing a command, type / or RUN to execute the SQL command. • Also, a semicolon at the end of ...
No Slide Title
No Slide Title

DIKTAT PRAKTIKUM SISTEM BASIS DATA (MySQL)
DIKTAT PRAKTIKUM SISTEM BASIS DATA (MySQL)

How Much Data
How Much Data

... Database) to create a policy function and apply the policy function to our table, so that it does NOT display certain rows for a given deptno, BUT ONLY when the salary and/or COMM columns are selected. So all rows displayed when I DON'T choose SAL and/or COMM and all rows EXCEPT deptno 10 when I DO ...
Referential Integrity in Oracle Rdb
Referential Integrity in Oracle Rdb

... The user can use the SET ALL CONSTRAINT statement to define the timing (IMMEDIATE, or DEFERRED) as well as force constraint evaluation when SET CONSTRAINT is used. If SET ALL CONSTRAINT IMMEDIATE is used then all subsequent statements will be followed by the evaluation of all active DEFERRABLE const ...
by Lester Knutsen - Advanced DataTools
by Lester Knutsen - Advanced DataTools

Paper
Paper

... The storage of XML can be achieved in three different ways: structure based storing, model based storing and text based storing. a. Structure Based Storing (e.g. STORED, POET): In structure based storing, the database schemas represent the logical structure of the XML document (or DTDs if they are a ...
PlantSuite RDBMS to PI
PlantSuite RDBMS to PI

... multiple records per query while each record can contain data for a different tag. To achieve this, a field must be provided in the query which contains the tagname or the alias tagname. This option is very efficient for getting exception-based data from an RDB table where it is unknown how many dat ...
chapter 1 - Sacramento - California State University
chapter 1 - Sacramento - California State University

... provides advanced multi user concurrency capabilities by allowing you to lock individual rows rather than entire tables. This engine is recommended where table needs support for the transactions. It is used when we are storing very large amount of data in a tables. The only overhead of this engine i ...
Chapter_5_PL_SQL
Chapter_5_PL_SQL

... Writing Database Access Program with PL/SQL (Updated on May 16, 2016) [The “class note” is the typical material I would prepare for my face-to-face class. Since this is an Internet based class, I am sharing the notes with everyone assuming you are in the class.] ...
Query Engine
Query Engine

... A Query Engine separates business logic from technical details on how search requests are ex­ ecuted. Application developers may concentrate on implementing business requirements without knowing details about the data sources. A Query Engine may provide features that are missing in a specific data s ...
Text of Chapter 5
Text of Chapter 5

... When a program declares a variable using a datatype that requires a constraint specification (such as VARCHAR2), the declaration must specify the constraint. The body of the example program uses the DBMS_OUTPUT.PUT_LINE procedure to direct output to the standard output. The DBMS_OUTPUT. PUT_LINE pro ...
Grocery Store Project
Grocery Store Project

... CHECKOUT: This entity type represents an atomic transaction of a customer purchasing items in the store. It relates to STORE via the CHECKOUT LOCATION relationship. It relates to CUSTOMERS via the BUY ITEMS relationship. It relates to the employee who performed the checkout with the EMPLOYEE CHECKOU ...
Package 'dplyr'
Package 'dplyr'

Introduction to Databases
Introduction to Databases

... Foreign keys hold a copy of a primary key in another table. Foreign keys hold a copy of a primary key in the same table. ...
1 Oblivious Bounds on the Probability of Boolean Functions WOLFGANG GATTERBAUER DAN SUCIU
1 Oblivious Bounds on the Probability of Boolean Functions WOLFGANG GATTERBAUER DAN SUCIU

... databases reduces to the problem of computing the probability of its lineage expression which is a a monotone, k-partite Boolean DNF where k is fixed by the number of joins in the query. Computing the probability of the lineage is known to be #P-hard for some queries [Dalvi and Suciu 2007], hence we ...
< 1 2 3 4 5 6 7 8 9 10 ... 141 >

Relational algebra

Relational algebra, first described by E.F. Codd while at IBM, is a family of algebra with a well-founded semantics used for modelling the data stored in relational databases, and defining queries on it.The main application of relational algebra is providing a theoretical foundation for relational databases, particularly query languages for such databases, chief among which is SQL.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report