Data Warehousing and Data Mining (OLAP) for Accessing Archived
... database, but deploys extensive metadata structures to manage the DW functions. The OLAP operations are implemented as SQL extensions that ‘understand’ the metadata and the cube/dimension table structures This is known as a relational OLAP implementation It creates a virtual multi‐dimensional data ...
... database, but deploys extensive metadata structures to manage the DW functions. The OLAP operations are implemented as SQL extensions that ‘understand’ the metadata and the cube/dimension table structures This is known as a relational OLAP implementation It creates a virtual multi‐dimensional data ...
Object-Oriented Databases: Tutorial.
... � Data organised as tuples in relations � Link between data tuples � primary and foreign keys � Relational algebra � project, select, join � Relational normal forms � Declarative language � data definition, consistency, manipulation and querying � Examples � Oracle 11g, Microsoft SQL Server, IBM DB2 ...
... � Data organised as tuples in relations � Link between data tuples � primary and foreign keys � Relational algebra � project, select, join � Relational normal forms � Declarative language � data definition, consistency, manipulation and querying � Examples � Oracle 11g, Microsoft SQL Server, IBM DB2 ...
Databases
... Course information (cont’d) Organization: The first part of the course will consist of lectures that will be given by the instructor. The second part of the course will consist of seminars to be delivered by students. The lectures and seminars will take place in DC3313 on Tuesdays from 4 to 6pm. Ou ...
... Course information (cont’d) Organization: The first part of the course will consist of lectures that will be given by the instructor. The second part of the course will consist of seminars to be delivered by students. The lectures and seminars will take place in DC3313 on Tuesdays from 4 to 6pm. Ou ...
PPT - Electrical and Computer Engineering Department
... a table An element t of r is a tuple, represented by a row in a table ...
... a table An element t of r is a tuple, represented by a row in a table ...
job description
... To work in a manner that actively seeks to reduce any negative environmental impact in relation to the processes and procedures operating within their area and across the wider business e.g. reduction of waste, recycling etc. Any other reasonable duties as may be required. ...
... To work in a manner that actively seeks to reduce any negative environmental impact in relation to the processes and procedures operating within their area and across the wider business e.g. reduction of waste, recycling etc. Any other reasonable duties as may be required. ...
Database security (chapter 5)
... Database systems Structured collection of data stored for use by one or more applications • Contains the relationships between data items and groups of data items • Can sometimes contain sensitive data that needs to be secured • Query language: Provides a uniform interface to the database ...
... Database systems Structured collection of data stored for use by one or more applications • Contains the relationships between data items and groups of data items • Can sometimes contain sensitive data that needs to be secured • Query language: Provides a uniform interface to the database ...
Database Systems Session 2 – Main Theme Relational Data Model
... single (possibly physically distributed) database system We start with a very simple example to introduce some concepts and issues to address We look at only a very small part of information of the type that an enterprise may need to keep We need some way of describing sample data We will th ...
... single (possibly physically distributed) database system We start with a very simple example to introduce some concepts and issues to address We look at only a very small part of information of the type that an enterprise may need to keep We need some way of describing sample data We will th ...
Software Engineering Lecture Slides
... named, user-defined set of valid data values. The Objects that may belong to a Domain are known as Domain Constraints. ...
... named, user-defined set of valid data values. The Objects that may belong to a Domain are known as Domain Constraints. ...
Document
... Establishment of a geologic framework for the USArray mission of EarthScope largely depends on community efforts that facilitate the integration of seismic data with petrologic, gravity, structural, and other geologic data. In an effort to address the needs of the GeoFrame/USArray community, EarthCh ...
... Establishment of a geologic framework for the USArray mission of EarthScope largely depends on community efforts that facilitate the integration of seismic data with petrologic, gravity, structural, and other geologic data. In an effort to address the needs of the GeoFrame/USArray community, EarthCh ...
A Language-Independent Approach to Refactoring through
... • Outline view and Property view – Communicate and synchronize with the drawing Canvas to display the outline, composition and properties of entities and relationships ...
... • Outline view and Property view – Communicate and synchronize with the drawing Canvas to display the outline, composition and properties of entities and relationships ...
28SpCS157BL14TRC4NFASRppt
... • In EQUIJOIN operation, if the two attributes in the join condition have the same name, then in the resulting relation we will have two identical columns. In order to avoid this problem, we define the NATURAL JOIN operation • The NATURAL JOIN operation is denoted by: R3 = R1 * R2
• ...
... • In EQUIJOIN operation, if the two attributes in the join condition have the same name, then in the resulting relation we will have two identical columns. In order to avoid this problem, we define the NATURAL JOIN operation • The NATURAL JOIN operation is denoted by: R3 = R1 *
Introduction to Databases & Integrity Issues with narration
... Chapter 6 – Database Security Integrity for databases: record integrity, data correctness, update integrity Security for databases: access control, inference, and aggregation Multilevel secure databases: partitioned, cryptographically sealed, filtered ...
... Chapter 6 – Database Security Integrity for databases: record integrity, data correctness, update integrity Security for databases: access control, inference, and aggregation Multilevel secure databases: partitioned, cryptographically sealed, filtered ...
Relational Database Model - Department of Computer Science
... relational data model describes data in terms of relations. The relational model is built around a simple and natural structure. A relation is actually a table. Tables are easy to understand and easy to use. The relational model provides a simple yet powerful way to represent data. The relational da ...
... relational data model describes data in terms of relations. The relational model is built around a simple and natural structure. A relation is actually a table. Tables are easy to understand and easy to use. The relational model provides a simple yet powerful way to represent data. The relational da ...
Comparative Study of ODBMS vs RDBMS
... often the control of the data are spread out over two or more geographically separate sites. Distributed database management systems are subject to many security threats additional to those present in a centralized database management system (DBMS). Furthermore, the development of adequate distribut ...
... often the control of the data are spread out over two or more geographically separate sites. Distributed database management systems are subject to many security threats additional to those present in a centralized database management system (DBMS). Furthermore, the development of adequate distribut ...
SQL Server Coding Standards and Best Practices
... load data from one table to another. New records will have to be added, existing records need to be updated and records not in the source should be deleted from the destination. How would you perform this with best performance? Using the MERGE statement ...
... load data from one table to another. New records will have to be added, existing records need to be updated and records not in the source should be deleted from the destination. How would you perform this with best performance? Using the MERGE statement ...
Questions A 1 Name of Field Example Data Data Type Title ( Mr, Ms
... They want to store these details in a database. Which type of database do you suggest and give two reasons for your answer. Flat-files cheaper and easy to make. Test your self The following notes summarize this topic. The notes are incomplete because they have words missing. Using the words in the ...
... They want to store these details in a database. Which type of database do you suggest and give two reasons for your answer. Flat-files cheaper and easy to make. Test your self The following notes summarize this topic. The notes are incomplete because they have words missing. Using the words in the ...
DBch1
... Building a Database • Design of DB determines the logical structure of the data • Not concerned with how it is stored in the computer • In Access, this means designing – Tables, attributes and relationships – Forms - screens to maintain, view and ...
... Building a Database • Design of DB determines the logical structure of the data • Not concerned with how it is stored in the computer • In Access, this means designing – Tables, attributes and relationships – Forms - screens to maintain, view and ...
Database System Concepts, --Silberschatz Korth, Sudarshan, -
... have been in use since the earliest days of electronic computing. Unlike New systems which can be utilized to widely unlike databases and needs, the vast maturity of more previous systems were tightly related to the custom databases in arrange to earn speed at the expense of flexibility. Originally ...
... have been in use since the earliest days of electronic computing. Unlike New systems which can be utilized to widely unlike databases and needs, the vast maturity of more previous systems were tightly related to the custom databases in arrange to earn speed at the expense of flexibility. Originally ...
OR102 - PL/SQL and Database Objects
... Execute on DBMS_OUTPUT Execute on DBMS_PIPE Execute on DBMS_ALERT Execute on DBMS_LOB Execute on DBMS_RANDOM Execute on UTL_FILE SELECT_CATALOG_ROLE (as a default role) In order to execute the exercises in the section on File Input/Output we will need a directory on the database server. This directo ...
... Execute on DBMS_OUTPUT Execute on DBMS_PIPE Execute on DBMS_ALERT Execute on DBMS_LOB Execute on DBMS_RANDOM Execute on UTL_FILE SELECT_CATALOG_ROLE (as a default role) In order to execute the exercises in the section on File Input/Output we will need a directory on the database server. This directo ...
Oracle PL/SQL - Pellissippi State Community College
... Variables are local to the code block Names can be up to 30 characters long and must begin with a character Declaration is like that in a table • Name then data type the semi-colon • Can be initialized using := operator in the declaration • Can be changed with := in the begin section • Can use const ...
... Variables are local to the code block Names can be up to 30 characters long and must begin with a character Declaration is like that in a table • Name then data type the semi-colon • Can be initialized using := operator in the declaration • Can be changed with := in the begin section • Can use const ...
DbSchema Tutorial with Introduction in SQL Databases
... The foreign key requires the referring table (employees) and referred table (customers) plus the columns for each of them. We can set an action to be taken if a customer is deleted. No action means nothing will be done. If we will try to drop a customer which has employees we will get back an error ...
... The foreign key requires the referring table (employees) and referred table (customers) plus the columns for each of them. We can set an action to be taken if a customer is deleted. No action means nothing will be done. If we will try to drop a customer which has employees we will get back an error ...
DBS201: Database Design and Introduction to SQL
... • IBM’s IMS was one of first hierarchical DBMS’s • Still used by many large legacy OLTP(online transaction processing) applications • Good at handling large volumes of data that only need to be accessed using only predefined paths ...
... • IBM’s IMS was one of first hierarchical DBMS’s • Still used by many large legacy OLTP(online transaction processing) applications • Good at handling large volumes of data that only need to be accessed using only predefined paths ...
Relational model
The relational model for database management is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by Edgar F. Codd. In the relational model of a database, all data is represented in terms of tuples, grouped into relations. A database organized in terms of the relational model is a relational database.The purpose of the relational model is to provide a declarative method for specifying data and queries: users directly state what information the database contains and what information they want from it, and let the database management system software take care of describing data structures for storing the data and retrieval procedures for answering queries.Most relational databases use the SQL data definition and query language; these systems implement what can be regarded as an engineering approximation to the relational model. A table in an SQL database schema corresponds to a predicate variable; the contents of a table to a relation; key constraints, other constraints, and SQL queries correspond to predicates. However, SQL databases deviate from the relational model in many details, and Codd fiercely argued against deviations that compromise the original principles.