The Approach (HadoopDB)
... • Parallel DBMS • Strong emphasis on performance and efficiency • Large scan operations (i.e. multidimensional aggregations, and joins) are easy to parallelize across nodes in a shared-nothing network • Parallel databases have been proven to scale really well into the tens of nodes • Few known deplo ...
... • Parallel DBMS • Strong emphasis on performance and efficiency • Large scan operations (i.e. multidimensional aggregations, and joins) are easy to parallelize across nodes in a shared-nothing network • Parallel databases have been proven to scale really well into the tens of nodes • Few known deplo ...
Chapter 14: Query Optimization
... Cost-based optimization is expensive, even with dynamic programming. Systems may use heuristics to reduce the number of choices that must ...
... Cost-based optimization is expensive, even with dynamic programming. Systems may use heuristics to reduce the number of choices that must ...
An Analytic Data Warehouse for Ad-hoc Queries
... Packs, instead of single data items or rows. With this respect, Brighthouse should be compared, e.g., to Netezza’s nearly ordered maps (better known as zone maps) [25] or Sand’s compressed segments’ metadata [16], as well as to various other, more or less conventional approaches to data block-level ...
... Packs, instead of single data items or rows. With this respect, Brighthouse should be compared, e.g., to Netezza’s nearly ordered maps (better known as zone maps) [25] or Sand’s compressed segments’ metadata [16], as well as to various other, more or less conventional approaches to data block-level ...
DBMS - Department of Higher Education
... and retrieve. This study material provides a new and comprehensive treatment of databases, dealing with the complete syllabuses for both an introductory course and an advanced course on databases. It offers a balanced view of concepts, languages and architectures, with reference to current technolog ...
... and retrieve. This study material provides a new and comprehensive treatment of databases, dealing with the complete syllabuses for both an introductory course and an advanced course on databases. It offers a balanced view of concepts, languages and architectures, with reference to current technolog ...
Document
... Durability requirement — once the user has been notified that the transaction has completed (i.e., the transfer of the $50 has taken place), the updates to the database by the transaction must persist even if there are software or ...
... Durability requirement — once the user has been notified that the transaction has completed (i.e., the transfer of the $50 has taken place), the updates to the database by the transaction must persist even if there are software or ...
Frequent Item set Mining Methods
... algorithm to solve it was proposed, later denoted as AIS. Shortly after that the algorithm was improved by R. Agrawal and R. Srikant and called Apriori. It is a seminal algorithm, which uses an iterative approach known as a level-wise search, where k-itemsets are used to explore (k+1)-itemsets. It u ...
... algorithm to solve it was proposed, later denoted as AIS. Shortly after that the algorithm was improved by R. Agrawal and R. Srikant and called Apriori. It is a seminal algorithm, which uses an iterative approach known as a level-wise search, where k-itemsets are used to explore (k+1)-itemsets. It u ...
Storage Technologies for Video Surveillance - Ecl-ips
... demands on speed of retrieval. For these reasons, a VMS will typically store this data within a structured database. Configuration data does pose some unique demands because it has to be encrypted and only modified when proper security checks have been performed. A VMS will also use a database to pr ...
... demands on speed of retrieval. For these reasons, a VMS will typically store this data within a structured database. Configuration data does pose some unique demands because it has to be encrypted and only modified when proper security checks have been performed. A VMS will also use a database to pr ...
Pizza Parlor Point-Of-Sales System CMPS 342 Database Systems
... that have to do with inventory, ordering, accounts payable, and labor, among others. Based on their answers we planned accordingly. From a business perspective we will be able to query historical data and produce total sales per day/week/month; sales based on pizza's sold; types of pizzas; salad and ...
... that have to do with inventory, ordering, accounts payable, and labor, among others. Based on their answers we planned accordingly. From a business perspective we will be able to query historical data and produce total sales per day/week/month; sales based on pizza's sold; types of pizzas; salad and ...
Moving to a fourth generation: SPC that lets you
... that fact that all this data lands in a relational database is quite useful. Much of this data ends up in Microsoft SQL Server, Oracle, IBM, or mySQL databases. Data in relational database is accessible. This accessibility can be configured to be local, plant wide, intranet wide, or even worldwide v ...
... that fact that all this data lands in a relational database is quite useful. Much of this data ends up in Microsoft SQL Server, Oracle, IBM, or mySQL databases. Data in relational database is accessible. This accessibility can be configured to be local, plant wide, intranet wide, or even worldwide v ...
Integrating XML and Databases
... HTML, it is a markup language, but it and sharing, integration of commercial transacsupports a richer set of features, such as user- tions, and workflow. The data-centric XML docudefined tags that allow both data and descriptive ment represented in Figure 1 contains invoice information about data to ...
... HTML, it is a markup language, but it and sharing, integration of commercial transacsupports a richer set of features, such as user- tions, and workflow. The data-centric XML docudefined tags that allow both data and descriptive ment represented in Figure 1 contains invoice information about data to ...
Computing Pareto Frontiers and Database
... preferences in our package, which is more general than Skylines but still has a clean and simple syntax. Our first ideas to process preferences in R were published in Roocks and Kießling (2013) under the name “R-Pref”. In that approach the Pareto set calculation was done entirely in R, requiring nes ...
... preferences in our package, which is more general than Skylines but still has a clean and simple syntax. Our first ideas to process preferences in R were published in Roocks and Kießling (2013) under the name “R-Pref”. In that approach the Pareto set calculation was done entirely in R, requiring nes ...
Practical Relational Database Design
... » For each regular binary M:N relationship type R, create a new relation S to represent R. This is a relationship relation. » Include as foreign key attributes in S the primary keys of the relations that represent the participating entity types; their combination will form the primary key of S. » Al ...
... » For each regular binary M:N relationship type R, create a new relation S to represent R. This is a relationship relation. » Include as foreign key attributes in S the primary keys of the relations that represent the participating entity types; their combination will form the primary key of S. » Al ...
Unit Testing Tips and Tricks: Database Interaction
... structure set up. Refactor mercilessly. • Especially if you need canned data that is ancillary to the test, it is often worth while to factor creation out into a static method in a utility class (object mother) so you can use it as necessary thereafter. ...
... structure set up. Refactor mercilessly. • Especially if you need canned data that is ancillary to the test, it is often worth while to factor creation out into a static method in a utility class (object mother) so you can use it as necessary thereafter. ...
erwin Data Modeler Data Modeling Overview Guide
... The use of any software product referenced in the Documentation is governed by the applicable license agreement and such license agreement is not modified in any way by the terms of this notice. The manufacturer of this Documentation is erwin Inc. Provided with “Restricted Rights.” Use, duplication ...
... The use of any software product referenced in the Documentation is governed by the applicable license agreement and such license agreement is not modified in any way by the terms of this notice. The manufacturer of this Documentation is erwin Inc. Provided with “Restricted Rights.” Use, duplication ...
Copyright Issues in Translation Memory Ownership
... are the main arguments employed to advocate, from a legal viewpoint, that the translator who creates the TM also owns it. The kind of documents that are translated using TM systems are not usually composed of language that can be regarded as original, or attributable to a specific author or entity. ...
... are the main arguments employed to advocate, from a legal viewpoint, that the translator who creates the TM also owns it. The kind of documents that are translated using TM systems are not usually composed of language that can be regarded as original, or attributable to a specific author or entity. ...
Role Transition Best Practices: Data Guard and Active Data
... While the baseline measurements show that role transition times have steadily improved, there are many variables in a production deployment that can influence the speed at which Data Guard performs the transition. Variables include: RAC or single instance databases, open or mounted standbys and vary ...
... While the baseline measurements show that role transition times have steadily improved, there are many variables in a production deployment that can influence the speed at which Data Guard performs the transition. Variables include: RAC or single instance databases, open or mounted standbys and vary ...
DBC-e05-Chapter-02-PP
... • An entity is something of importance to a user that needs to be represented in a database • An entity represents one theme or topic • In an entity-relationship model (discussed in Chapter 4), entities are restricted to things that can be represented by a single table KROENKE and AUER - DATABASE CO ...
... • An entity is something of importance to a user that needs to be represented in a database • An entity represents one theme or topic • In an entity-relationship model (discussed in Chapter 4), entities are restricted to things that can be represented by a single table KROENKE and AUER - DATABASE CO ...
mod-8
... Form a schema for each lower-level entity set, include primary key of higher-level entity set and local attributes schema person student employee ...
... Form a schema for each lower-level entity set, include primary key of higher-level entity set and local attributes schema person student employee ...
Universal Data Access: A Success Story
... The following user story is representative of the issues that most large organizations in the U.S. face regarding·data. Data are scattered throughout New England Power Service Company in a variety of data sources including DB2®, the SAS information database, and legacy data "in older production'IMS ...
... The following user story is representative of the issues that most large organizations in the U.S. face regarding·data. Data are scattered throughout New England Power Service Company in a variety of data sources including DB2®, the SAS information database, and legacy data "in older production'IMS ...
here.
... Find the customer names and their loan numbers for all customers having a loan at some branch. select customer-name, T.loan-number, S.amount from borrower as T, loan as S where T.loan-number = S.loan-number Find the names of all branches that have greater assets than some branch located in Brook ...
... Find the customer names and their loan numbers for all customers having a loan at some branch. select customer-name, T.loan-number, S.amount from borrower as T, loan as S where T.loan-number = S.loan-number Find the names of all branches that have greater assets than some branch located in Brook ...
Top 10 Reasons to Deploy DB2 Version 9.1 for z/OS
... privileges by roles rather than groups or users simplifies DB2 9 for z/OS security administration. DB2 9 for z/OS also adds a trusted security feature that lets you define trusted connections (DDF, RRS, and DSN) to the DBMS. By regulating authorized connections to DB2 for z/OS, overall enterprise se ...
... privileges by roles rather than groups or users simplifies DB2 9 for z/OS security administration. DB2 9 for z/OS also adds a trusted security feature that lets you define trusted connections (DDF, RRS, and DSN) to the DBMS. By regulating authorized connections to DB2 for z/OS, overall enterprise se ...
The Hobgoblin of Little Minds
... In the serializable isolation level, transactions must execute in such a way that they appear to be executed one at a time (“serially”), rather than concurrently. […] In other words, concurrent transactions executing in serializable mode are only permitted to make database changes they could have ma ...
... In the serializable isolation level, transactions must execute in such a way that they appear to be executed one at a time (“serially”), rather than concurrently. […] In other words, concurrent transactions executing in serializable mode are only permitted to make database changes they could have ma ...
Database model
A database model is a type of data model that determines the logical structure of a database and fundamentally determines in which manner data can be stored, organized, and manipulated. The most popular example of a database model is the relational model, which uses a table-based format.