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A Hierarchical Framework for Content
... • Decouples the knowledge organization from the image matching mechanism – Requires expert involvement to encode knowledge of smaller set of data – Images and image matching algorithms in the large target database can change and improve with no impact to knowledge – Multiple, distributed domain data ...
... • Decouples the knowledge organization from the image matching mechanism – Requires expert involvement to encode knowledge of smaller set of data – Images and image matching algorithms in the large target database can change and improve with no impact to knowledge – Multiple, distributed domain data ...
Centralized System Logging With A Database
... openssh-server, openntp Check logs (/var/log/{daemon.log,syslog}) Create pipe (“mkfifo /var/run/pgsql.pipe” or “mknod /var/run/pgsql.pipe p”) chmod 700 /var/run/pgsql.pipe ...
... openssh-server, openntp Check logs (/var/log/{daemon.log,syslog}) Create pipe (“mkfifo /var/run/pgsql.pipe” or “mknod /var/run/pgsql.pipe p”) chmod 700 /var/run/pgsql.pipe ...
Chapter 10
... • Transaction log keeps track of all transactions that modify database • Concurrency control coordinates simultaneous execution of transactions • Scheduler is responsible for establishing order in which concurrent transaction operations are executed ...
... • Transaction log keeps track of all transactions that modify database • Concurrency control coordinates simultaneous execution of transactions • Scheduler is responsible for establishing order in which concurrent transaction operations are executed ...
Chapter7QBEgood
... Find Unmatched query The Find Unmatched Query Wizard is used to find records in one table that do not have related records in another table ...
... Find Unmatched query The Find Unmatched Query Wizard is used to find records in one table that do not have related records in another table ...
A Formal Framework for Reflective Database Access Control Policies∗
... invokes itself by querying the table. A system that enables safe forms of such reference will have useful additional expressive power. Third, and most importantly, existing implementations of RDBAC have no formal description. Since the interactions between access privileges and arbitrary data in the ...
... invokes itself by querying the table. A system that enables safe forms of such reference will have useful additional expressive power. Third, and most importantly, existing implementations of RDBAC have no formal description. Since the interactions between access privileges and arbitrary data in the ...
userhome.brooklyn.cuny.edu
... addressable section of disk (e.g., 4K, 8K or 16K) • If you want to write 73 bytes to a 4K page, the entire page must be read from disk, updated in memory and written back to disk – A table can span multiple pages and a page can contain several rows of one or more tables • As long as two transactions ...
... addressable section of disk (e.g., 4K, 8K or 16K) • If you want to write 73 bytes to a 4K page, the entire page must be read from disk, updated in memory and written back to disk – A table can span multiple pages and a page can contain several rows of one or more tables • As long as two transactions ...
Algebra
... Two mathematical Query Languages form the basis for “real” languages (e.g. SQL), and for implementation: Relational Algebra: More operational, very useful for representing execution plans. Relational Calculus: Lets users describe what they want, rather than how to compute it. (Nonoperational, de ...
... Two mathematical Query Languages form the basis for “real” languages (e.g. SQL), and for implementation: Relational Algebra: More operational, very useful for representing execution plans. Relational Calculus: Lets users describe what they want, rather than how to compute it. (Nonoperational, de ...
PAQO: A Preference-Aware Query Optimizer for PostgreSQL
... constraints. Our modifications to PostgreSQL touch a subset of the code base totaling over 60,000 lines of code. Parsing and Data Structures. To be able to process PASQL constraints during optimization, we first need to parse these constraints out of incoming queries. As such, we extended PostgreSQL ...
... constraints. Our modifications to PostgreSQL touch a subset of the code base totaling over 60,000 lines of code. Parsing and Data Structures. To be able to process PASQL constraints during optimization, we first need to parse these constraints out of incoming queries. As such, we extended PostgreSQL ...
Document
... values. The domain declaration A dom requires that the A value of all tuples be values in dom. Key declaration. Let R be a relation schema with K R. The key declaration key (K) requires that K be a superkey for schema R (K R). All key declarations are functional dependencies but not all func ...
... values. The domain declaration A dom requires that the A value of all tuples be values in dom. Key declaration. Let R be a relation schema with K R. The key declaration key (K) requires that K be a superkey for schema R (K R). All key declarations are functional dependencies but not all func ...
Parallel Query Processing in Shared Disk Database Systems
... the network, while SD would require moving large q uantities of data. TI1is argument apparently assumes conventional (non-parallel) database processing because efficient intra-query parallelism for SN requires redistribution of large amounts of data berween nodes (see section 3). Furthermore, SN is ...
... the network, while SD would require moving large q uantities of data. TI1is argument apparently assumes conventional (non-parallel) database processing because efficient intra-query parallelism for SN requires redistribution of large amounts of data berween nodes (see section 3). Furthermore, SN is ...
Download jdbc.ppt
... Thus if ODBC driver exists for a database this bridge can be used to communicate with the database from a Java application ...
... Thus if ODBC driver exists for a database this bridge can be used to communicate with the database from a Java application ...
The interface development for machine shop simulation
... reducing production cost, improving product quality, and shortening development time. However, this technology remains largely underutilized by industry today. This is because custom simulator development is complex and costly, and custom translators are needed to run commercial simulation software. ...
... reducing production cost, improving product quality, and shortening development time. However, this technology remains largely underutilized by industry today. This is because custom simulator development is complex and costly, and custom translators are needed to run commercial simulation software. ...
indexing XML
... • Database – supports fast unordered tuple retrieval • XML – supports representing semi/unstructured data but order of elements and hierarchy are important • As seen in last paper, large # of joins is required to query XML • Shredding – decomposes XML based on its schema into Relational tables ...
... • Database – supports fast unordered tuple retrieval • XML – supports representing semi/unstructured data but order of elements and hierarchy are important • As seen in last paper, large # of joins is required to query XML • Shredding – decomposes XML based on its schema into Relational tables ...
Database Security
... transactions may be operating on the same data • As such, the sequencing of uncommitted updates, rollbacks, and commits continuously change the data content • The 1992 ANSI SQL standard defines four isolation levels that specify which of the concurrency control problems are allowed to occur. KROENKE ...
... transactions may be operating on the same data • As such, the sequencing of uncommitted updates, rollbacks, and commits continuously change the data content • The 1992 ANSI SQL standard defines four isolation levels that specify which of the concurrency control problems are allowed to occur. KROENKE ...
Certain Answers as Objects and Knowledge
... Incomplete databases. These have two types of values: constants (e.g., 1, 2, . . .) and nulls, representing unknown values. We thus assume countably infinite sets of constants, denoted by Const, and of nulls, denoted by Null. Nulls themselves are denoted by ⊥, sometimes with sub- or superscripts. A ...
... Incomplete databases. These have two types of values: constants (e.g., 1, 2, . . .) and nulls, representing unknown values. We thus assume countably infinite sets of constants, denoted by Const, and of nulls, denoted by Null. Nulls themselves are denoted by ⊥, sometimes with sub- or superscripts. A ...
The Relational Theory
... • Treat data in a disciplined way –Apply rigor of mathematics –Uses Set Theory – sets of related data • Improve programmer productivity ...
... • Treat data in a disciplined way –Apply rigor of mathematics –Uses Set Theory – sets of related data • Improve programmer productivity ...
A Self-managing Data Cache for Edge-Of
... results. The limitations of dynamic content caching solutions and the importance of database scalability over the web have prompted much industry interest in data caching and distribution. Database caching schemes, using full or partial table replication, have been proposed [20, 24, 17]. These are h ...
... results. The limitations of dynamic content caching solutions and the importance of database scalability over the web have prompted much industry interest in data caching and distribution. Database caching schemes, using full or partial table replication, have been proposed [20, 24, 17]. These are h ...
L01Relational_Data_Models
... Relational algebra and relational calculus are equivalent with respect to their ability to formulate queries against relational databases (Codd 1972) Relational algebra concentrates on the procedural (“how-to”) aspects and because of this it is used as an intermediate language for optimization of da ...
... Relational algebra and relational calculus are equivalent with respect to their ability to formulate queries against relational databases (Codd 1972) Relational algebra concentrates on the procedural (“how-to”) aspects and because of this it is used as an intermediate language for optimization of da ...
How to Guide: SQL Server 2005 Consolidation
... As these administrators face this surge of new hardware, management faces the ever increasing costs of running the data centers. Power costs, hardware costs, and personnel costs are rising and straining budgets. To overcome this budget-bursting surge of equipment and manpower, server manufacturers h ...
... As these administrators face this surge of new hardware, management faces the ever increasing costs of running the data centers. Power costs, hardware costs, and personnel costs are rising and straining budgets. To overcome this budget-bursting surge of equipment and manpower, server manufacturers h ...
Chapter 9 - Personal.kent.edu
... • Rollback/Commit: Ensuring all actions are successful before posting to the database • Multitasking: Simultaneously serving multiple users • Lost Updates: When one user’s action overwrites another user’s request ...
... • Rollback/Commit: Ensuring all actions are successful before posting to the database • Multitasking: Simultaneously serving multiple users • Lost Updates: When one user’s action overwrites another user’s request ...
Microsoft® ADO.NET
... Represents a cache of data that contains tables, columns, relationships, and constraints, just like a database Regardless of where the source data comes from, data can all be placed into DataSet objects Tracks changes that are made to the data it holds before updating the source data DataSet are als ...
... Represents a cache of data that contains tables, columns, relationships, and constraints, just like a database Regardless of where the source data comes from, data can all be placed into DataSet objects Tracks changes that are made to the data it holds before updating the source data DataSet are als ...
Using R with databases
... examine the database schema or define new views to simplify data access from your R scripts. By default, R will read all of the data into memory before performing any analysis. When queries are processed by relational database servers such as DB2, the system will not simply load all of the data from ...
... examine the database schema or define new views to simplify data access from your R scripts. By default, R will read all of the data into memory before performing any analysis. When queries are processed by relational database servers such as DB2, the system will not simply load all of the data from ...
R - METU Computer Engineering
... – Choose the best and “nearly best” plans for each (a plan is considered nearly best if its output has some “interesting” form, e.g., is sorted) – Combine these 1-relation plans into 2-relation expressions. Retain only the best and nearly best 2relation plans – Do same for 3-relation expressions, et ...
... – Choose the best and “nearly best” plans for each (a plan is considered nearly best if its output has some “interesting” form, e.g., is sorted) – Combine these 1-relation plans into 2-relation expressions. Retain only the best and nearly best 2relation plans – Do same for 3-relation expressions, et ...
ppt - Cern
... OQL provides object query capability and is 90% compatible with SQL-92 SELECT OQL is an OMG Data Query service ODMG is an OMG PDS (Persistent Data Service) protocol ODL is a superset of the OMG IDL ODMG is a superset of the OMG Common Object Model ...
... OQL provides object query capability and is 90% compatible with SQL-92 SELECT OQL is an OMG Data Query service ODMG is an OMG PDS (Persistent Data Service) protocol ODL is a superset of the OMG IDL ODMG is a superset of the OMG Common Object Model ...
Versant Object Database
![](https://commons.wikimedia.org/wiki/Special:FilePath/Versant_logo_2007.png?width=300)
Versant Object Database (VOD) is an object database software product developed by Versant Corporation.The Versant Object Database enables developers using object oriented languages to transactionally store their information by allowing the respective language to act as the Data Definition Language (DDL) for the database. In other words, the memory model is the database schema model.In general, persistence in VOD in implemented by declaring a list of classes, then providing a transaction demarcation application programming interface to use cases. Respective language integrations adhere to the constructs of that language, including syntactic and directive sugars.Additional APIs exist, beyond simple transaction demarcation, providing for the more advanced capabilities necessary to address practical issues found when dealing with performance optimization and scalability for systems with large amounts of data, many concurrent users, network latency, disk bottlenecks, etc.