Query Rewriting in Itemset Mining
... extraction of frequent itemsets and study the conditions under which query rewriting in the constraint-based mining language is possible. By query rewriting we mean the determination of a relational expression on a set of queries whose result is equivalent to the result of a given query for every da ...
... extraction of frequent itemsets and study the conditions under which query rewriting in the constraint-based mining language is possible. By query rewriting we mean the determination of a relational expression on a set of queries whose result is equivalent to the result of a given query for every da ...
A METHOD FOR MINING FUNCTIONAL DEPENDENCIES IN
... We optimize an existing method introduced by [4], which provides a direct translation from relational databases into the language of power context families and calculates the functional dependencies in a relational table. In order to generate the tuple pairs necessary to build the formal context of ...
... We optimize an existing method introduced by [4], which provides a direct translation from relational databases into the language of power context families and calculates the functional dependencies in a relational table. In order to generate the tuple pairs necessary to build the formal context of ...
cos 346 day 8 & 9
... In some situations, a surrogate key should be defined Copyright © 2004 Database Processing: Fundamentals, Design, and Implementation, 9/e by David M. Kroenke ...
... In some situations, a surrogate key should be defined Copyright © 2004 Database Processing: Fundamentals, Design, and Implementation, 9/e by David M. Kroenke ...
Evaluation of EMC VNX8000 and EMC XtremSW Cache September 2013
... workloads (both OLTP and DW) than ever before, and with the addition of XtremSW Cache server flash caching, can satisfy even higher requirements than the VNX alone. The VNX8000 with SSDs deployed as primary storage achieved more than 730,000 IOPS in a combined SQL Server and Oracle Database enviro ...
... workloads (both OLTP and DW) than ever before, and with the addition of XtremSW Cache server flash caching, can satisfy even higher requirements than the VNX alone. The VNX8000 with SSDs deployed as primary storage achieved more than 730,000 IOPS in a combined SQL Server and Oracle Database enviro ...
SQL Server Performance Methodology with Oracle
... • Technical Note 9: Best Practices for Microsoft SQL Server Disk Layout with Siebel Applications This note seeks to cover some of the common issues that we see in database/disk configuration with Oracle Apps and types of configurations that you can use when planning the layout of your database. It i ...
... • Technical Note 9: Best Practices for Microsoft SQL Server Disk Layout with Siebel Applications This note seeks to cover some of the common issues that we see in database/disk configuration with Oracle Apps and types of configurations that you can use when planning the layout of your database. It i ...
Integrity Constraints
... made to the database by authorized users do not result in a loss of data consistency. Thus, integrity constraints guard against accidental damage to the database. Database integrity refers to the validity and consistency of stored data. Integrity is usually expressed in terms of constraints, which a ...
... made to the database by authorized users do not result in a loss of data consistency. Thus, integrity constraints guard against accidental damage to the database. Database integrity refers to the validity and consistency of stored data. Integrity is usually expressed in terms of constraints, which a ...
StreamsPerformance - Indico
... read-only 5. Transfer the data files of each tablespace to the remote system 6. Import tablespaces metadata in the target 7. Make tablespaces readwrite ...
... read-only 5. Transfer the data files of each tablespace to the remote system 6. Import tablespaces metadata in the target 7. Make tablespaces readwrite ...
Beyond MapReduce - University of Pennsylvania
... Atomicity: Either all the operations in the transaction succeed, or none of the operations persist (all-or-nothing) Consistency: If the data are consistent before the transaction begins, they will be consistent after the transaction completes Isolation: The effects of a transaction that is still in ...
... Atomicity: Either all the operations in the transaction succeed, or none of the operations persist (all-or-nothing) Consistency: If the data are consistent before the transaction begins, they will be consistent after the transaction completes Isolation: The effects of a transaction that is still in ...
Relational Database: A Practical Foundation for Productivity
... {3) A collection of general integrity rules, which implicitly or explicitly define the set of consistent database states or changes of state or both--these rules are general in the sense that they apply to any database using this model {incidentally, they may sometimes be expressed as insert-update ...
... {3) A collection of general integrity rules, which implicitly or explicitly define the set of consistent database states or changes of state or both--these rules are general in the sense that they apply to any database using this model {incidentally, they may sometimes be expressed as insert-update ...
Oracle 9i to Oracle 10g Upgrade Guide
... previously stored in separate tablespaces, including statspack statistics. For more information, see the Oracle Database Administrator's Guide for Oracle 10g (available from Oracle). ...
... previously stored in separate tablespaces, including statspack statistics. For more information, see the Oracle Database Administrator's Guide for Oracle 10g (available from Oracle). ...
branch-name
... average account balance is greater than $1200. select branch-name, avg-balance from (select branch-name, avg (balance) from account group by branch-name) as result (branch-name, avg-balance) where avg-balance > 1200 Note that we do not need to use the having clause, since we compute the temporary (v ...
... average account balance is greater than $1200. select branch-name, avg-balance from (select branch-name, avg (balance) from account group by branch-name) as result (branch-name, avg-balance) where avg-balance > 1200 Note that we do not need to use the having clause, since we compute the temporary (v ...
KorthDB6_ch5
... Permits definition of procedures in SQL, with if-then-else statements, for and while loops, etc. ...
... Permits definition of procedures in SQL, with if-then-else statements, for and while loops, etc. ...
Statement
... SQL Exceptions Nearly every JDBC method can throw a SQLException in response to a data access error If more than one error occurs, they are chained together SQL exceptions contain: Description of the error, getMessage The SQLState (Open Group SQL specification) identifying the exception, ...
... SQL Exceptions Nearly every JDBC method can throw a SQLException in response to a data access error If more than one error occurs, they are chained together SQL exceptions contain: Description of the error, getMessage The SQLState (Open Group SQL specification) identifying the exception, ...
Relational Database Design - Department of Computer Science and
... a functional dependency α→ β to decompose a relation schema r(α, β, γ) into r1(α, β) and r2(α, γ). Give an example of an inconsistency that can arise due to an erroneous update, if the foreign-key constraint were not enforced on the decomposed relations. ...
... a functional dependency α→ β to decompose a relation schema r(α, β, γ) into r1(α, β) and r2(α, γ). Give an example of an inconsistency that can arise due to an erroneous update, if the foreign-key constraint were not enforced on the decomposed relations. ...
Enhanced Oracle Database Monitor Plugin
... 4. Example of the Enhanced Oracle Database Monitor Plugin dashboard Example of the dashboard is depicted on Figure 4. Highlighted in red are dashlets which display per SQL stats, database locks, and explain plans of slow SQLs. These dashlets are: 1. “Slow SQL” - contains the latest stats only (no hi ...
... 4. Example of the Enhanced Oracle Database Monitor Plugin dashboard Example of the dashboard is depicted on Figure 4. Highlighted in red are dashlets which display per SQL stats, database locks, and explain plans of slow SQLs. These dashlets are: 1. “Slow SQL” - contains the latest stats only (no hi ...
Chapter 1: Introduction - Internet Database Lab.
... communicate with a Web server to fetch data and modify the current page using fetched data, without needing to reload/refresh the page forms basis of AJAX technology used widely in Web 2.0 applications E.g. on selecting a country in a drop-down menu, the list of states in that ...
... communicate with a Web server to fetch data and modify the current page using fetched data, without needing to reload/refresh the page forms basis of AJAX technology used widely in Web 2.0 applications E.g. on selecting a country in a drop-down menu, the list of states in that ...
Cause - Dynatrace Community
... 2. VAS processing of vdata files was taking about 3 minutes (sub 1 second is normal). 3. Method data from VA not available in VAS reports. ...
... 2. VAS processing of vdata files was taking about 3 minutes (sub 1 second is normal). 3. Method data from VA not available in VAS reports. ...
Disaster Recovery Plan
... do his backups. A common scheme is to do a full backup at the beginning of each week, followed by deltas -- backups of changes -- at least daily if not more often. These can be differential backups, where the entire difference from the starting state is copied each time, or incremental, where the di ...
... do his backups. A common scheme is to do a full backup at the beginning of each week, followed by deltas -- backups of changes -- at least daily if not more often. These can be differential backups, where the entire difference from the starting state is copied each time, or incremental, where the di ...
Ontology materialization from relational database sources using D2RQ
... Tetherless World Constellation Rensselaer Polytechnic Institute ...
... Tetherless World Constellation Rensselaer Polytechnic Institute ...