Data Cleaning: Overview and Emerging Challenges
... tection, employ statistical methods to identify abnormal behaviors and errors (e.g., “a salary that is three standard deviation away from the mean salary is an error”). On the other hand, qualitative techniques use constraints, rules, patterns to detect errors (e.g., “there cannot exist two employee ...
... tection, employ statistical methods to identify abnormal behaviors and errors (e.g., “a salary that is three standard deviation away from the mean salary is an error”). On the other hand, qualitative techniques use constraints, rules, patterns to detect errors (e.g., “there cannot exist two employee ...
Query Processing in Main Memory Database Management Systems
... Every relanon in the MM-DBMS ~11 be broken up mto partltions, a partmon is a umt of recovery that IS larger than a typical &Sk page, probably on the order of one or two Qsk tracks In order to allow more freedom of design of these pamuons, the relanons ~111 not be allowed to be traversed dltecdy, so ...
... Every relanon in the MM-DBMS ~11 be broken up mto partltions, a partmon is a umt of recovery that IS larger than a typical &Sk page, probably on the order of one or two Qsk tracks In order to allow more freedom of design of these pamuons, the relanons ~111 not be allowed to be traversed dltecdy, so ...
Performance Comparison of Database Access over the Internet
... submits the query to the DBMS. It then submits the query. When the query returns, the servlet records the system time (the completion-time) again and saves the start-time, the completion-time, and the elapsed time into a data file. Once the experiment is completed, the data files were fed into an an ...
... submits the query to the DBMS. It then submits the query. When the query returns, the servlet records the system time (the completion-time) again and saves the start-time, the completion-time, and the elapsed time into a data file. Once the experiment is completed, the data files were fed into an an ...
SpiraTeam High Availability and Backup
... tape backup of the shared SQL Server disk array and the file attachments disk array and store offsite To obtain a more granular recovery, you can augment this solution with hourly differential backups of the SQL Server followed by the full daily backup These are both using the “Simple Recovery M ...
... tape backup of the shared SQL Server disk array and the file attachments disk array and store offsite To obtain a more granular recovery, you can augment this solution with hourly differential backups of the SQL Server followed by the full daily backup These are both using the “Simple Recovery M ...
m - Hal
... Describe mappings from various types of DB to RDF • Query the target database • Pick data elements from query results • Translate them to (subject, predicate, object) using arbitrary ontologies ...
... Describe mappings from various types of DB to RDF • Query the target database • Pick data elements from query results • Translate them to (subject, predicate, object) using arbitrary ontologies ...
Lab6-MSA-Macros-Modules-Internet
... another Windows-based or MS-DOS–based application from your application, but you can't use a macro to do much else outside Microsoft Access. Using Visual Basic, you can check to see if a file exists on the system, use Automation or dynamic data exchange (DDE) to communicate with other Windows-based ...
... another Windows-based or MS-DOS–based application from your application, but you can't use a macro to do much else outside Microsoft Access. Using Visual Basic, you can check to see if a file exists on the system, use Automation or dynamic data exchange (DDE) to communicate with other Windows-based ...
Slide 1
... • Detect accidental conflicts when multiple replication nodes update the same row • Prevents inconsistent data across nodes • Conflicting change is treated as a critical error that causes the failure of the Distribution Agent • Topology remains in an inconsistent state until the conflict is resolved ...
... • Detect accidental conflicts when multiple replication nodes update the same row • Prevents inconsistent data across nodes • Conflicting change is treated as a critical error that causes the failure of the Distribution Agent • Topology remains in an inconsistent state until the conflict is resolved ...
A proposal for Content Management System
... trade secret of ITS. It is not to be used or disclosed except to the recipient’s employees, officers and agents or contractors engaged in evaluating the recommendations and who are subject to appropriate written undertakings consistent with these confidentiality and use restriction issues. Every Tab ...
... trade secret of ITS. It is not to be used or disclosed except to the recipient’s employees, officers and agents or contractors engaged in evaluating the recommendations and who are subject to appropriate written undertakings consistent with these confidentiality and use restriction issues. Every Tab ...
JDBC (Java DataBase Connectivity)
... con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY); String query = “select students from class where type=‘not sleeping’ “; ResultSet rs = stmt.executeQuery( query ); rs.previous(); / / go back in the RS (not possible in JDBC 1…) rs.relative(-5); / / go 5 records back ...
... con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY); String query = “select students from class where type=‘not sleeping’ “; ResultSet rs = stmt.executeQuery( query ); rs.previous(); / / go back in the RS (not possible in JDBC 1…) rs.relative(-5); / / go 5 records back ...
Database Performance Study - Information Systems Department
... Most companies’ structure coincide closely with the one presented above. In general, data architects are in charge of the database logical model (table structures, relationships…), while the physical implementation is left to the DBA’s. The degree of specialization can vary from company to company, ...
... Most companies’ structure coincide closely with the one presented above. In general, data architects are in charge of the database logical model (table structures, relationships…), while the physical implementation is left to the DBA’s. The degree of specialization can vary from company to company, ...
DBAdminFund_PPT_5.2
... There are two types of full backup for a database system: The first type copies all items of the database, including open items, such as files that are open at the time of the backup. The second type copies all items of the database and all items on the server. It copies server files that the da ...
... There are two types of full backup for a database system: The first type copies all items of the database, including open items, such as files that are open at the time of the backup. The second type copies all items of the database and all items on the server. It copies server files that the da ...
Stasis: Flexible Transactional Storage Russell Sears and Eric Brewer
... An example of this mismatch occurs with DBMS support for persistent objects. In a typical usage, an array of objects is made persistent by mapping each object to a row in a table (or sometimes multiple tables) [22] and then issuing queries to keep the objects and rows consistent. Also, for efficienc ...
... An example of this mismatch occurs with DBMS support for persistent objects. In a typical usage, an array of objects is made persistent by mapping each object to a row in a table (or sometimes multiple tables) [22] and then issuing queries to keep the objects and rows consistent. Also, for efficienc ...
Hierarchies and Relative Operators in the OLAP Environment
... hoc aggregates, as well as a few algebraic operators. In this paper, we deal more about multiple hierarchies, and we introduce the multiplicity of a hierarchy as a semantic variant of the simple one. Sometimes, dimensions are organized in hierarchies in which there are different aggregate levels [11 ...
... hoc aggregates, as well as a few algebraic operators. In this paper, we deal more about multiple hierarchies, and we introduce the multiplicity of a hierarchy as a semantic variant of the simple one. Sometimes, dimensions are organized in hierarchies in which there are different aggregate levels [11 ...
Advanced SQL - Computer Engineering Department
... Or, run external language functions/procedures in a separate process, with no access to the database process’ ...
... Or, run external language functions/procedures in a separate process, with no access to the database process’ ...
Association Rule Mining: A Survey
... from large information repositories such as: relational database, data warehouses etc. The goal of the data mining process is to extract information from a data set and transform it into an understandable structure for further use. Data mining has been given much attention in database communities du ...
... from large information repositories such as: relational database, data warehouses etc. The goal of the data mining process is to extract information from a data set and transform it into an understandable structure for further use. Data mining has been given much attention in database communities du ...
Chapter 10
... • Transaction is logical unit of work that must be either entirely completed or aborted • Successful transaction changes database from one consistent state to another – One in which all data integrity constraints are satisfied ...
... • Transaction is logical unit of work that must be either entirely completed or aborted • Successful transaction changes database from one consistent state to another – One in which all data integrity constraints are satisfied ...
The associative model of data
... British Library Cataloguing-in-Publication Data. A catalogue record for this book is available from the British Library. ...
... British Library Cataloguing-in-Publication Data. A catalogue record for this book is available from the British Library. ...
Research was carried out on both SQL and NoSQL
... statistics of market share of both platforms from 2016Q2. With Android dominating the market with a share of 87.6% and IOS behind with 11.7% (idc.com, 2016). From these statistics the decision to make the application on the Android platform first was decided. With the application being developed on ...
... statistics of market share of both platforms from 2016Q2. With Android dominating the market with a share of 87.6% and IOS behind with 11.7% (idc.com, 2016). From these statistics the decision to make the application on the Android platform first was decided. With the application being developed on ...
Best Practices for Conflict Detection and Resolution in
... the same stock at the same time. Removing the conflicts in such critical situations can really allow this type of configuration to succeed, but also provide phenomenal results. Through the use of an application server, this can be made even easier by having a pool of connections to issue the trades, ...
... the same stock at the same time. Removing the conflicts in such critical situations can really allow this type of configuration to succeed, but also provide phenomenal results. Through the use of an application server, this can be made even easier by having a pool of connections to issue the trades, ...
Updating Legacy Databases through Wrappers: Data Consistency
... unforeseen contexts, such as Web-based applications or federated systems. Data wrappers, and more specifically updating wrappers (that not only access legacy data but also update them), can provide external clients of an existing (legacy) database with a neutral interface and augmented capabilities. ...
... unforeseen contexts, such as Web-based applications or federated systems. Data wrappers, and more specifically updating wrappers (that not only access legacy data but also update them), can provide external clients of an existing (legacy) database with a neutral interface and augmented capabilities. ...
Slide 1
... Warehouse. The projected cost savings are more than $2 million initially with ongoing savings of $500,000 a year.” - Michael Henson “We achieved a 43 per cent saving in total storage requirements when using DB2 with Deep Compression for its SAP NetWeaver BI application, when compared with the former ...
... Warehouse. The projected cost savings are more than $2 million initially with ongoing savings of $500,000 a year.” - Michael Henson “We achieved a 43 per cent saving in total storage requirements when using DB2 with Deep Compression for its SAP NetWeaver BI application, when compared with the former ...
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.