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ARCS 2G - Minisoft Inc.
ARCS 2G - Minisoft Inc.

Relational Data structure
Relational Data structure

Temporal Data Management for Protocol
Temporal Data Management for Protocol

Module 1: Introduction
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... Forms of authorization to modify the database schema (covered in Chapter 8):  Index - allows creation and deletion of indices.  Resources - allows creation of new relations.  Alteration - allows addition or deletion of attributes in a relation. ...
Chapter 4: Advanced SQL
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... Forms of authorization to modify the database schema (covered in Chapter 8):  Index - allows creation and deletion of indices.  Resources - allows creation of new relations.  Alteration - allows addition or deletion of attributes in a relation. ...
Connection Object - Pearson Education
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... some data. The data is called content. • When you create an XML document, you need to follow certain rules. These rules are:  Every start tag should have a closing tag called the end tag.  Tags should not overlap because XML documents follow a hierarchy.  There can be only one root element. ...
transactions, database tuning, and advanced topics
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... from different transactions. Actually, operations on different arguments need not be ordered in time, provided conflicting ones are. Schedule is serializable if following graph (serialization graph) is acyclic: Nodes are transactions. Edge from Ti to Tj if an operation from Ti precedes and conflicts ...
Databases and MySQL in 21 minutes
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... – select column-names from tables where condition ; select * from books; select name, adr from custs; select title, price from books where price > 50; select * from books where author = "Sedgewick"; select author, title from books where author like "S%"; select author, title from books order by auth ...
Oracle_ch7 - Gonzaga University Student Web Server
Oracle_ch7 - Gonzaga University Student Web Server

... – commands that work with the (physical) data in the database. e.g., SELECT, INSERT, UPDATE, and DELETE • DCL ( Data Control Language ) – commands that control a database, including administering privileges. e.g., GRANT, REVOKE. Dr. Chen, Oracle Database System (Oracle) ...
Backup_and_Recovery
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... are the result of an internal exception within the DBMS, an operating system failure, or other software-related database failure. In some cases, an instance failure can result in corruption of data that requires a recovery, but usually such failures do not damage data, so the DBMS simply needs to be ...
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... Android provides several ways to store apps data. For example, apps can store text files both in their own files directory and in the phone SD card. Sometimes, however, an app needs to be able to carry out complex operations on persistent data, or the volume of data requires a more efficient method ...
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... encoding scheme before changing the database character set. Some examples of what may be found during a data scan are the number of schema objects where the column widths need to be expanded and the extent of the data that does not exist in the target character repertoire. This information helps to ...
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THE DESIGN AND IMPLEMENTATION OF AN E

... where any product (such as books, CDs, computers, mobile phones, electronic items, and home appliances) can be bought from the comfort of home through the Internet. However, for implementation purposes, this paper will deal with an online book store. ...
SQL - United International College
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... Null Values  It is possible for tuples to have a null value, denoted by null, for some ...
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... • Associate each event with the corresponding database information ...
Chapter 3 Effects of IT on Strategy and Competition
Chapter 3 Effects of IT on Strategy and Competition

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... – There are three types of data sources • A file data source is a file that can be shared among database users—the only requirement is that the users have the same DBMS driver and privilege to access the database • A system data source is one that is local to a single computer—the operating system a ...
Introduction to Object Oriented Distributed Systems and Web Services
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... • The server exports its interfaces • Compiler creates a receiver-side “dispatch” routine to interpret incoming requests • At runtime, the server registers itself in a namespace • Then it loops waiting for incoming requests ...
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... (2) Enumerate all two-way join plans using the access plans as building blocks. also enumerate alternative join plans for all relevant sites, (3) Build three-way join plans, using access-plans and two-way join plans as building blocks. (4) Continues in this way until has enumerated all n-way join pl ...
Grant and Revoke
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... -Label ID. A numeric value used to uniquely identify each policy label. Oracle recommends that it is best to use the Label ID value to arrange the labels into common-sense groupings, since the Label ID is used extensively during retrieval of and decision making about secured data. -Label Tag. The ta ...
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... Database Interface (DBI) provides methods & attributes for generic SQL commands Database Driver (DBD) is an interface to a specific database system (MySQL, Oracle, etc.) Convenient for Web access to databases, because the Perl program can be run as CGI on the Web server system AW lecture notes Progr ...
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... discusses the database itself primarily, but it also touches on getting data to a middle tier of a multi-tier system. The information should be beneficial to a DBA or a software developer, and especially a person whose job includes aspects of both positions. ...
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Modular Data Storage with Anvil
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... An Anvil table representation will usually consist of several readonly dTables, created at different times, and one writable dTable. Using this representation directly from client code would inconveniently require consultation of all the dTables. In addition, the periodic conversion of write-optimiz ...
VB Database Connectivity - West Virginia University
VB Database Connectivity - West Virginia University

... 1. Continue with the Windows form created in the previous hands-on tutorial. Drag-and-drop a PictureBox control onto the right of the existing controls. 2. Verify that the Image property of the PictureBox control has the default value ...
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Concurrency control

In information technology and computer science, especially in the fields of computer programming, operating systems, multiprocessors, and databases, concurrency control ensures that correct results for concurrent operations are generated, while getting those results as quickly as possible.Computer systems, both software and hardware, consist of modules, or components. Each component is designed to operate correctly, i.e., to obey or to meet certain consistency rules. When components that operate concurrently interact by messaging or by sharing accessed data (in memory or storage), a certain component's consistency may be violated by another component. The general area of concurrency control provides rules, methods, design methodologies, and theories to maintain the consistency of components operating concurrently while interacting, and thus the consistency and correctness of the whole system. Introducing concurrency control into a system means applying operation constraints which typically result in some performance reduction. Operation consistency and correctness should be achieved with as good as possible efficiency, without reducing performance below reasonable levels. Concurrency control can require significant additional complexity and overhead in a concurrent algorithm compared to the simpler sequential algorithm.For example, a failure in concurrency control can result in data corruption from torn read or write operations.
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