Mgt 240 Lecture
... Operational databases are built for applications not for easy querying and analysis Queries and reports add overhead to operational applications-slow systems down. Warehouse/Mart structured for ease of query and analysis; isolated from operational data so that those systems not affected by lengthy q ...
... Operational databases are built for applications not for easy querying and analysis Queries and reports add overhead to operational applications-slow systems down. Warehouse/Mart structured for ease of query and analysis; isolated from operational data so that those systems not affected by lengthy q ...
on HID
... Neuroinformatics is an emerging discipline which attempts to integrate neuroscientific information from the level of the genome to the level of human behavior. A major goal of this new discipline is to produce digital capabilities for a web-based information management system in the form of interope ...
... Neuroinformatics is an emerging discipline which attempts to integrate neuroscientific information from the level of the genome to the level of human behavior. A major goal of this new discipline is to produce digital capabilities for a web-based information management system in the form of interope ...
chapter 3 - Central Washington University
... Every record on a file should contain at least one field that uniquely identifies instances of that record so that record can be retrieved, updated and sorted. This identifier field is called KEY FIELD. Social security number for a personnel record would be a key field. ...
... Every record on a file should contain at least one field that uniquely identifies instances of that record so that record can be retrieved, updated and sorted. This identifier field is called KEY FIELD. Social security number for a personnel record would be a key field. ...
New Technologies for Delivering Data to Internal and External Clients
... Back in the Big Iron era, programmers captured, stored, and delivered data in the same form. Files were all we knew. Now we have visual representations: Web data entry forms, MDBB's, Web page browsers, and electronic codebooks. What we consider the same 'data' have different shapes and structures in ...
... Back in the Big Iron era, programmers captured, stored, and delivered data in the same form. Files were all we knew. Now we have visual representations: Web data entry forms, MDBB's, Web page browsers, and electronic codebooks. What we consider the same 'data' have different shapes and structures in ...
NoSQL CA485 Ray Walshe 2015
... also versioned by timestamps (either real time or application defined time) and sorted such that the most recent cell is first. To help manage these multiple versions, BigTable provides a mechanism to remove entries either by date (keep versions since some time t) or by amount (keep only the latest ...
... also versioned by timestamps (either real time or application defined time) and sorted such that the most recent cell is first. To help manage these multiple versions, BigTable provides a mechanism to remove entries either by date (keep versions since some time t) or by amount (keep only the latest ...
DBMS Functions - gozips.uakron.edu
... • Users don’t need to know how data is stored or manipulated • Users add, change, and delete records during updates ...
... • Users don’t need to know how data is stored or manipulated • Users add, change, and delete records during updates ...
Relational Databases
... Rule 6: Map multi-valued aggregation and association relationships to a new associative table that relates the two original tables together. Copy the primary key from both original tables to the new associative table Rule 7: For aggregation and association relationships of mixed type, copy the prima ...
... Rule 6: Map multi-valued aggregation and association relationships to a new associative table that relates the two original tables together. Copy the primary key from both original tables to the new associative table Rule 7: For aggregation and association relationships of mixed type, copy the prima ...
Physical Design
... structures Location of files on disk (e.g. blocking) Planning for size and growth Planning for data warehouse storage as well as other storage such as staging area and client desktops ...
... structures Location of files on disk (e.g. blocking) Planning for size and growth Planning for data warehouse storage as well as other storage such as staging area and client desktops ...
Data Warehousing
... simply do not map to the natural thinking processes of business users. It is unrealistic to expect business users to navigate through such data structures. If business users are expected to perform queries against the warehouse database on an ad hoc basis and if IT professionals want to remove thems ...
... simply do not map to the natural thinking processes of business users. It is unrealistic to expect business users to navigate through such data structures. If business users are expected to perform queries against the warehouse database on an ad hoc basis and if IT professionals want to remove thems ...
What is Data Warehouse?
... - A snowflake schema can sometimes reflect the way in which users think about data. Users may prefer to generate queries using a star schema in some cases, although this may or may not be reflected in the underlying organization of the database. - Some users may wish to submit queries to the databas ...
... - A snowflake schema can sometimes reflect the way in which users think about data. Users may prefer to generate queries using a star schema in some cases, although this may or may not be reflected in the underlying organization of the database. - Some users may wish to submit queries to the databas ...
Databases
... Reduced Upgrade outage from 12 days to 6 days Allowed 3 clones to be supported on test server instead of 2 pre-archive User agreement for archiving was easy to achieve because of application access to archived data Source: “Worldwide Upgrade to Oracle 11i: A Recipe for Success” OAUG ...
... Reduced Upgrade outage from 12 days to 6 days Allowed 3 clones to be supported on test server instead of 2 pre-archive User agreement for archiving was easy to achieve because of application access to archived data Source: “Worldwide Upgrade to Oracle 11i: A Recipe for Success” OAUG ...
MIKADO : Java tool for XML Creation V. Tosello
... that must be exported. This request must return only one column which is the identifier of each entry and that will be used for subqueries. SQL syntax must be adapted to your own database (example provided for Oracle IFREMER EDMED database): ...
... that must be exported. This request must return only one column which is the identifier of each entry and that will be used for subqueries. SQL syntax must be adapted to your own database (example provided for Oracle IFREMER EDMED database): ...
Chapter 6 Study Tool
... and foreign keys 4. Verify all data dictionary entries 5. After creating your final ERD and normalized table designs, you can transform them into a database ...
... and foreign keys 4. Verify all data dictionary entries 5. After creating your final ERD and normalized table designs, you can transform them into a database ...
The University of Hong Kong
... data integrity, namely entity integrity, referential integrity and domain integrity, are explained. In order to help explain the above terminology and concepts, a problem scenario about a school library is introduced as below: The library of XYZ School has decided to computerize its services so as t ...
... data integrity, namely entity integrity, referential integrity and domain integrity, are explained. In order to help explain the above terminology and concepts, a problem scenario about a school library is introduced as below: The library of XYZ School has decided to computerize its services so as t ...
Outline
... often the operational systems, providing the lowest level of data. designed for operational use, not for decision support, and the data reflect this fact. Multiple data sources are often from different systems run on a wide range of hardware and much of the software is built in-house or highly custo ...
... often the operational systems, providing the lowest level of data. designed for operational use, not for decision support, and the data reflect this fact. Multiple data sources are often from different systems run on a wide range of hardware and much of the software is built in-house or highly custo ...
Database management system Document Notes
... Referential Integrity: Referential Integrity makes sure that a foreign key value always points to an existing row. ...
... Referential Integrity: Referential Integrity makes sure that a foreign key value always points to an existing row. ...
Introduction - Homepages | The University of Aberdeen
... • Data to be structured, defined and stored independent of application programs – Data + metadata = database (another definition!) ...
... • Data to be structured, defined and stored independent of application programs – Data + metadata = database (another definition!) ...
Database Systems Chapter 1 1 Database Systems:
... Why Database Design is Important • Defines the database’s expected use • Different approach needed for different types of databases • Avoid redundant data • Poorly designed database generates errors leads to bad decisions can lead to failure of organization Database Systems: Design, Implementati ...
... Why Database Design is Important • Defines the database’s expected use • Different approach needed for different types of databases • Avoid redundant data • Poorly designed database generates errors leads to bad decisions can lead to failure of organization Database Systems: Design, Implementati ...
Slides from David
... Rules for designing the schema: – Relation X inlines all nodes Y that it an reach such that the path from X to Y does not contain a node that is to be made a separate relation. – Inlined elements are flagged as being a root with the isRoot field. ...
... Rules for designing the schema: – Relation X inlines all nodes Y that it an reach such that the path from X to Y does not contain a node that is to be made a separate relation. – Inlined elements are flagged as being a root with the isRoot field. ...
Database Requirements for CCP4 Projects
... small/lightweight db system to support applications, but not to provide either a data model for all structure solution software applications or a central database implementation. Next stage of the project is to revise and expand db schema, and the development is dependent on input from application d ...
... small/lightweight db system to support applications, but not to provide either a data model for all structure solution software applications or a central database implementation. Next stage of the project is to revise and expand db schema, and the development is dependent on input from application d ...
DATABASE SYSTEMS
... management, buffer management, access methods) Systems supporting structured and/or stream content. Overview of Relational Model, notion of a relation, tuples, attributes, domains, and set their set-theoretic definitions Relational vs. modern no-Sql databases Relational Algebra, Unary Operations (Se ...
... management, buffer management, access methods) Systems supporting structured and/or stream content. Overview of Relational Model, notion of a relation, tuples, attributes, domains, and set their set-theoretic definitions Relational vs. modern no-Sql databases Relational Algebra, Unary Operations (Se ...
