Expression and Enforcement of Dynamic Integrity Constraints
... checked by inspecting the most recent state of a database (knowledge base). For example, the constraint "salaries never decrease" refers to objects (here salaries) of former states of the database. On the other hand, the uniqueness of social security numbers can be checked by inspecting the most rec ...
... checked by inspecting the most recent state of a database (knowledge base). For example, the constraint "salaries never decrease" refers to objects (here salaries) of former states of the database. On the other hand, the uniqueness of social security numbers can be checked by inspecting the most rec ...
ECDL / ICDL Using Databases Level 1 Syllabus Version 1.0 (UK)
... This document details the syllabus for ECDL / ICDL Using Databases at Level 1. The syllabus describes, through learning outcomes, the knowledge and skills that a candidate for ECDL / ICDL Using Databases at Level 1 should possess. The syllabus also provides the basis for the theory and practice-base ...
... This document details the syllabus for ECDL / ICDL Using Databases at Level 1. The syllabus describes, through learning outcomes, the knowledge and skills that a candidate for ECDL / ICDL Using Databases at Level 1 should possess. The syllabus also provides the basis for the theory and practice-base ...
The Relational Database Model
... The linking table primary key consists of the two attributes CLASS_CODE and STU_NUM to make it unique The foreign keys repeat throughout the table, but they will not produce anomalies as long as referential integrity is enforced In the Chen model, the linking table uses a diamond within a rect ...
... The linking table primary key consists of the two attributes CLASS_CODE and STU_NUM to make it unique The foreign keys repeat throughout the table, but they will not produce anomalies as long as referential integrity is enforced In the Chen model, the linking table uses a diamond within a rect ...
connecting to databases with asp.net
... It is important to understand that even though many database management systems support the same database formats (flat-file, relational, hierarchical, or network), each database management system is an individual application that creates its own proprietary file types. For example, even though Acce ...
... It is important to understand that even though many database management systems support the same database formats (flat-file, relational, hierarchical, or network), each database management system is an individual application that creates its own proprietary file types. For example, even though Acce ...
Activate Physical Standby: Controlled failover
... Introduction The solution that would best fit the LNC requirements, at this point in time, is the implementation of Oracle Data Guard. We are confident that this is the best approach without implementing RMAN. Using Data Guard will allow an active standby database for the production database. This e ...
... Introduction The solution that would best fit the LNC requirements, at this point in time, is the implementation of Oracle Data Guard. We are confident that this is the best approach without implementing RMAN. Using Data Guard will allow an active standby database for the production database. This e ...
mod-7 - Avi Silberschatz
... separate process that applies the changes over to a replica There are better ways of doing these now: Databases today provide built in materialized view facilities to maintain summary data Databases provide built-in support for replication Encapsulation facilities can be used instead of trig ...
... separate process that applies the changes over to a replica There are better ways of doing these now: Databases today provide built in materialized view facilities to maintain summary data Databases provide built-in support for replication Encapsulation facilities can be used instead of trig ...
Document
... Intraoperation Parallelism – parallelize the execution of each individual operation in the query. ...
... Intraoperation Parallelism – parallelize the execution of each individual operation in the query. ...
On the Information Content of Semi-Structured
... two database schemas when there is a one-to-one correspondence between the number of objects that can be constructed by using sets of domain values over the attributes of both schemas. In the context of complex objects, a complete set of restructuring operations on database schemas that preserve abs ...
... two database schemas when there is a one-to-one correspondence between the number of objects that can be constructed by using sets of domain values over the attributes of both schemas. In the context of complex objects, a complete set of restructuring operations on database schemas that preserve abs ...
COURSE NAME Database System THE COURSE CURRICULUM IS
... HOW CAN YOU GET THE MOST FROM THIS COURSE? Much of what we discuss here is not too difficult if you put some thought into your study of it. One way to sharpen your knowledge in database systems is by getting into the websites that have been provided and try to understand the examples included in the ...
... HOW CAN YOU GET THE MOST FROM THIS COURSE? Much of what we discuss here is not too difficult if you put some thought into your study of it. One way to sharpen your knowledge in database systems is by getting into the websites that have been provided and try to understand the examples included in the ...
Chapter 3
... A server crash is an abnormal server shutdown. For example, an unfortunate operating system operation or problem could unexpectedly kill one or more of a server's background processes. Consequently, the database server might crash. Oracle has built-in features that protect the work of all committed ...
... A server crash is an abnormal server shutdown. For example, an unfortunate operating system operation or problem could unexpectedly kill one or more of a server's background processes. Consequently, the database server might crash. Oracle has built-in features that protect the work of all committed ...
4. Intermediate SQL
... create role teaching_assistant; grant teaching_assistant to instructor; instructor inherits all privileges of teaching_assistant Chain of Roles create role dean; grant instructor to dean; grant dean to Satoshi; ...
... create role teaching_assistant; grant teaching_assistant to instructor; instructor inherits all privileges of teaching_assistant Chain of Roles create role dean; grant instructor to dean; grant dean to Satoshi; ...
6. Compatibility Assessment for Migration to DB2 pureScale
... The Database Conversion Workbench supports the migration from older DB2 versions to DB2 10.1, and the movement of database objects and data between DB2 10.1 databases. DCW offers the following step-by-step functions to facilitate the process. 1. DCW Task Launcher– An integrated help guide, which pro ...
... The Database Conversion Workbench supports the migration from older DB2 versions to DB2 10.1, and the movement of database objects and data between DB2 10.1 databases. DCW offers the following step-by-step functions to facilitate the process. 1. DCW Task Launcher– An integrated help guide, which pro ...
An introduction to Graph Data Management
... on application areas and user needs. In this section, we review the most influential models and compare them to graph db-models. The Relational db-model [83, 84] was introduced by Codd and is based on the simple notion of relation, which together with its associated algebra and logic, made the relat ...
... on application areas and user needs. In this section, we review the most influential models and compare them to graph db-models. The Relational db-model [83, 84] was introduced by Codd and is based on the simple notion of relation, which together with its associated algebra and logic, made the relat ...
Chapter 8
... for relational databases? • How do you develop a database? • What is object-orientation, and how is it relevant to databases? © Worboys and Duckham (2004) GIS: A Computing Perspective, Second Edition, CRC Press ...
... for relational databases? • How do you develop a database? • What is object-orientation, and how is it relevant to databases? © Worboys and Duckham (2004) GIS: A Computing Perspective, Second Edition, CRC Press ...
Accounting Information Systems: The Crossroads of Accounting and IT
... Objective: Q2.2 What is the role of the database in the enterprise? 15) How are hierarchical databases and network databases similar? How are they different? Answer: Hierarchical databases and network databases are similar in that they store data in records that are not grouped into database tables. ...
... Objective: Q2.2 What is the role of the database in the enterprise? 15) How are hierarchical databases and network databases similar? How are they different? Answer: Hierarchical databases and network databases are similar in that they store data in records that are not grouped into database tables. ...
Module 1: Introduction
... 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. ...
... 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: SQL
... Procedures and functions can be invoked also from dynamic SQL SQL:1999 allows more than one function/procedure of the same name (called name overloading), as long as the number of arguments differ, or at least the types of the arguments differ ...
... Procedures and functions can be invoked also from dynamic SQL SQL:1999 allows more than one function/procedure of the same name (called name overloading), as long as the number of arguments differ, or at least the types of the arguments differ ...