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11_TransactionMgmt_S..
... A transaction is a collection of one or more operations on one or more databases,which reflects a discrete unit of work In the real world, this happened (completely) or it didn’t happen at all (Atomicity) Can be read-only (e.g. RequestBalance), but typically updating ...
... A transaction is a collection of one or more operations on one or more databases,which reflects a discrete unit of work In the real world, this happened (completely) or it didn’t happen at all (Atomicity) Can be read-only (e.g. RequestBalance), but typically updating ...
3.1.1 The Structure of JDBC
... Of course, the ODBC specification exists to provide this universal abstraction layer for languages such as C and C++, as well as popular development tools such as Delphi, PowerBuilder, and VisualBasic. Unfortunately, ODBC does not enjoy the platform independence of Java. Using the JDBC interface des ...
... Of course, the ODBC specification exists to provide this universal abstraction layer for languages such as C and C++, as well as popular development tools such as Delphi, PowerBuilder, and VisualBasic. Unfortunately, ODBC does not enjoy the platform independence of Java. Using the JDBC interface des ...
Elixir Repertoire Runtime
... Intialize the ReportEngineFactory by calling init. The interface IReportHost allows you to implement your own class to log messages from the runtime. The BasicReportHost is the default implementation provided. The code example is shown below. ReportEngineFactory.init(new BasicReportHost()); ...
... Intialize the ReportEngineFactory by calling init. The interface IReportHost allows you to implement your own class to log messages from the runtime. The BasicReportHost is the default implementation provided. The code example is shown below. ReportEngineFactory.init(new BasicReportHost()); ...
Do we need the closed-world assumption in knowledge
... used knowledge representation languages have restricted expressiveness and are in their current form no longer suitable for natural language applications. They are still more expressive than data de nition languages, but the question can be risen whether there is an application needing this addition ...
... used knowledge representation languages have restricted expressiveness and are in their current form no longer suitable for natural language applications. They are still more expressive than data de nition languages, but the question can be risen whether there is an application needing this addition ...
Python: Strings - CS-People by full name
... >>> db.rollback() • to make permanent all changes made during a transaction: >>> db.commit() • committing or rolling back a transaction begins a new one • If an error occurs when executing a command, you need to rollback the current transaction before issuing other commands. ...
... >>> db.rollback() • to make permanent all changes made during a transaction: >>> db.commit() • committing or rolling back a transaction begins a new one • If an error occurs when executing a command, you need to rollback the current transaction before issuing other commands. ...
Data Resource Management
... data that has been extracted from the operational, external and other databases Data has been cleaned, transformed and cataloged Used by managers and professionals for ...
... data that has been extracted from the operational, external and other databases Data has been cleaned, transformed and cataloged Used by managers and professionals for ...
AutoPart: Automating Schema Design for Large Scientific Databases
... views used in the underlying physical design. The database community has recently focused on tools that utilize workload information to automatically design indexes [1][5][13]. Currently, all major commercial systems ship with design tools that identify access patterns in the input workload and prop ...
... views used in the underlying physical design. The database community has recently focused on tools that utilize workload information to automatically design indexes [1][5][13]. Currently, all major commercial systems ship with design tools that identify access patterns in the input workload and prop ...
Cracking the Database Store
... point-selections (attr θ cst with θ in {=, ! =}) and doublesided range predicates attr ∈ [low, high]. To re-gain the consecutive ranges property, we propose a second version a selection-cracking that yields three pieces: attr < low, attr ∈ [low, high], and attr > high In this scenario, pointselectio ...
... point-selections (attr θ cst with θ in {=, ! =}) and doublesided range predicates attr ∈ [low, high]. To re-gain the consecutive ranges property, we propose a second version a selection-cracking that yields three pieces: attr < low, attr ∈ [low, high], and attr > high In this scenario, pointselectio ...
dmsunit5ppt - SNGCE DIGITAL LIBRARY
... • If a transaction Ti requests a lock and transaction Tj holds a conflicting lock, the lock manager can use one of the following two policies: • Wait-die: If Ti has higher priority, it is allowed to wait; otherwise it is aborted. (non preemptive:- only a transaction requesting a lock can be aborted ...
... • If a transaction Ti requests a lock and transaction Tj holds a conflicting lock, the lock manager can use one of the following two policies: • Wait-die: If Ti has higher priority, it is allowed to wait; otherwise it is aborted. (non preemptive:- only a transaction requesting a lock can be aborted ...
The SELECT Command
... • Three basic DML statements (ANSI SQL): – INSERT: • To add rows to table ...
... • Three basic DML statements (ANSI SQL): – INSERT: • To add rows to table ...
Query and Analysis of Data on Electric Consumption
... It turns out that relational databases truly havea very high efficiency when dealing with small amount of data, because relational databases have a lot of optimization over the storage of data, which is better than cloud platforms. But when it comes to magnanimity data, Hadoop platform puts relation ...
... It turns out that relational databases truly havea very high efficiency when dealing with small amount of data, because relational databases have a lot of optimization over the storage of data, which is better than cloud platforms. But when it comes to magnanimity data, Hadoop platform puts relation ...
CREATION OF DATABASE APPLICATIONS Study Support Ing
... systems (RDMS - relational database management systems). RDMS is based on the relational model, which is based on two mathematical disciplines: the set theory and predicate logic. This chapter presents the theoretical foundation of SQL, the relational model and the data lifecycle. The goal is not an ...
... systems (RDMS - relational database management systems). RDMS is based on the relational model, which is based on two mathematical disciplines: the set theory and predicate logic. This chapter presents the theoretical foundation of SQL, the relational model and the data lifecycle. The goal is not an ...
A Case for Staged Database Systems
... [SW+76], actually consisted of four “stages” (processes) that enabled pipelining (the reason for breaking up the DBMS software was main memory size limitations). Staging was also known to improve CPU performance in the mid-seventies [AWE]. This section discusses representative pieces of work from a ...
... [SW+76], actually consisted of four “stages” (processes) that enabled pipelining (the reason for breaking up the DBMS software was main memory size limitations). Staging was also known to improve CPU performance in the mid-seventies [AWE]. This section discusses representative pieces of work from a ...
author
... A decomposition model for XML data The storage model indexes the elements and text of the documents by their position in the graph. If the structures are trees, this representation can help to answer queries fast. On the other hand, for graphs the positions of the elements many times cannot help fa ...
... A decomposition model for XML data The storage model indexes the elements and text of the documents by their position in the graph. If the structures are trees, this representation can help to answer queries fast. On the other hand, for graphs the positions of the elements many times cannot help fa ...
A Methodology for Database System Performance Evaluation
... our measure of degree of data sharing. If the degree of data sharing is 0%, there is no data sharing amongst the concurrently executing queries and each query will reference its own partition of the database (or a separate database). Furthermore, all queries from the same application will reference ...
... our measure of degree of data sharing. If the degree of data sharing is 0%, there is no data sharing amongst the concurrently executing queries and each query will reference its own partition of the database (or a separate database). Furthermore, all queries from the same application will reference ...
ERC+: an object+relationship paradigm for database applications
... are high that OO DBMS will significantly improve over traditional database technologies in meeting the requirements of these applications. In particular, systems supporting data structures which allow database objects to look like those users deal with in the real world will make user-DBMS interacti ...
... are high that OO DBMS will significantly improve over traditional database technologies in meeting the requirements of these applications. In particular, systems supporting data structures which allow database objects to look like those users deal with in the real world will make user-DBMS interacti ...
Oracle OLAP Option Bud Endress Director of Product Management
... • Do you use business intelligence tools? • Would business users benefit from: – Significantly improved query performance? – Rich analytic content? ...
... • Do you use business intelligence tools? • Would business users benefit from: – Significantly improved query performance? – Rich analytic content? ...
One-Copy Serializability with Snapshot Isolation under
... while providing global one-copy-serializability (1SR). To guarantee serializability, concurrency control algorithms typically require access to data read and written in update transactions. Accessing this data is especially difficult in a replicated database system since built-in facilities inside a ...
... while providing global one-copy-serializability (1SR). To guarantee serializability, concurrency control algorithms typically require access to data read and written in update transactions. Accessing this data is especially difficult in a replicated database system since built-in facilities inside a ...
downloading
... of some specific dimensionality once it is sampled and quantised for storage and manipulation in a computer system; additionally, a variety of artificial sources such as simulators, image renderers, and data warehouse population tools generate array data. The common characteristic they all share is ...
... of some specific dimensionality once it is sampled and quantised for storage and manipulation in a computer system; additionally, a variety of artificial sources such as simulators, image renderers, and data warehouse population tools generate array data. The common characteristic they all share is ...
Notes on Laravel - The Risberg Family
... configuration files. In fact, if you review the Laravel configuration files, you will notice several of the options already using this helper: 'debug' => env('APP_DEBUG', false), The second value passed to the env function is the "default value". This value will be used if no environment variable e ...
... configuration files. In fact, if you review the Laravel configuration files, you will notice several of the options already using this helper: 'debug' => env('APP_DEBUG', false), The second value passed to the env function is the "default value". This value will be used if no environment variable e ...
Retrieving Data from a Database
... Retrieving Data from a Database The topic of the last hour was data access basics. You learned about the basics of the ADO object model, and you created an ODBC data source, which was then used in the Active Server Pages (ASP) example to retrieve data from the Northwind database. However, you have t ...
... Retrieving Data from a Database The topic of the last hour was data access basics. You learned about the basics of the ADO object model, and you created an ODBC data source, which was then used in the Active Server Pages (ASP) example to retrieve data from the Northwind database. However, you have t ...
Comparing the Performance of NoSQL Approaches for Managing Archetype-Based
... data from an EHR of a single patient, and also for OLAP analysis. In addition they should allow population-based ad hoc queries, that is, queries that are not planned in advance, thus having no query-specific indexing optimizations, or whose results could not be easily retrieved from a data warehous ...
... data from an EHR of a single patient, and also for OLAP analysis. In addition they should allow population-based ad hoc queries, that is, queries that are not planned in advance, thus having no query-specific indexing optimizations, or whose results could not be easily retrieved from a data warehous ...
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.