12recovery - NDSU Computer Science
... A traditional hologram is produced when a beam of laser light, the reference beam, interferes with another beam reflected from the object to be recorded. The pattern of interference is captured by photographic film, a light-sensitive crystal or some other optical material. Illuminating th pattern by ...
... A traditional hologram is produced when a beam of laser light, the reference beam, interferes with another beam reflected from the object to be recorded. The pattern of interference is captured by photographic film, a light-sensitive crystal or some other optical material. Illuminating th pattern by ...
Visual Basic 6 Database Programming Bible
... language of choice for programmers all over the world. There are many reasons they choose Visual Basic: one, it is easy to learn how to use; two, you can build complex applications faster in Visual Basic than in any other programming language; and three, Visual Basic programs are easy to debug. In a ...
... language of choice for programmers all over the world. There are many reasons they choose Visual Basic: one, it is easy to learn how to use; two, you can build complex applications faster in Visual Basic than in any other programming language; and three, Visual Basic programs are easy to debug. In a ...
XP Open an existing database
... • If you want to see just a portion of the data in a table you can create a query. • A query is a question you ask about the data stored in a database table. • Access responds by displaying the data according to your question. – For example, if you ask to see all the customers from New York, the res ...
... • If you want to see just a portion of the data in a table you can create a query. • A query is a question you ask about the data stored in a database table. • Access responds by displaying the data according to your question. – For example, if you ask to see all the customers from New York, the res ...
Chapter 3. - GEOCITIES.ws
... – Number of simultaneous users – Volume of transactions Information Technology & Management Thompson Cats-Baril ...
... – Number of simultaneous users – Volume of transactions Information Technology & Management Thompson Cats-Baril ...
A Database Perspective on Knowledge Discovery
... Thus, rule discovery is viewed as yet another, perhaps more expressive, type of querying. Rules that constitute answers to rule queries are no more (or less) “discovered” than tuples in the answers to SQL queries. But rules are not necessarily the final product of the KDD applications. Thus, a prope ...
... Thus, rule discovery is viewed as yet another, perhaps more expressive, type of querying. Rules that constitute answers to rule queries are no more (or less) “discovered” than tuples in the answers to SQL queries. But rules are not necessarily the final product of the KDD applications. Thus, a prope ...
Query / Restrict Operations with Relational Tables
... Relational tables have many advantages, but, if improperly structured, table may suffer from: •Poor performance ...
... Relational tables have many advantages, but, if improperly structured, table may suffer from: •Poor performance ...
Concurrency Control in Distributed Databases
... However, in case only some replicas of a data item failed, it may be possible to continue transactions that had accessed data at a failed site (more on this later) If replicated data items were at failed site, update system catalog to remove them from the list of replicas. This should be rever ...
... However, in case only some replicas of a data item failed, it may be possible to continue transactions that had accessed data at a failed site (more on this later) If replicated data items were at failed site, update system catalog to remove them from the list of replicas. This should be rever ...
Methods
... Handling huge files (of the order of Gigabytes) Supporting simultaneous access to multiple files by multiple users Supporting the required disk bandwidth Caching strategies should also support the above requirements. Data might have to be distributed over an array of disks in the local system ...
... Handling huge files (of the order of Gigabytes) Supporting simultaneous access to multiple files by multiple users Supporting the required disk bandwidth Caching strategies should also support the above requirements. Data might have to be distributed over an array of disks in the local system ...
Database System Architectures
... Implementation Issues for Distributed Databases Atomicity needed even for transactions that update data at multiple sites The two-phase commit protocol (2PC) is used to ensure atomicity ...
... Implementation Issues for Distributed Databases Atomicity needed even for transactions that update data at multiple sites The two-phase commit protocol (2PC) is used to ensure atomicity ...
Understanding Software Application Interfaces via String
... in Figure 4. The methods in Figure 4 each issue an SQL query to the database via a JDBC method but more importantly each of these methods shares a similarity that is not immediately obvious from the source code, namely they each only access the Defect table. The numbers 1, 2, 3, and 4 in Figure 3 co ...
... in Figure 4. The methods in Figure 4 each issue an SQL query to the database via a JDBC method but more importantly each of these methods shares a similarity that is not immediately obvious from the source code, namely they each only access the Defect table. The numbers 1, 2, 3, and 4 in Figure 3 co ...
CH9
... Lost Updates, Uncommitted Data, Inconsistent Retrieval Uncommitted Data T1 reads the data and modifies it and writes. ...
... Lost Updates, Uncommitted Data, Inconsistent Retrieval Uncommitted Data T1 reads the data and modifies it and writes. ...
MySQL tutorial Emile Chungtien Chi and install MYSQL
... To load the remaining tables, change the script file to prof.txt and table prof, etc. To check that your database is loaded properly, type show tables; ...
... To load the remaining tables, change the script file to prof.txt and table prof, etc. To check that your database is loaded properly, type show tables; ...
week10
... • A view is more for viewing rather than updating since an update could disqualify a record from the view. • Updates made to a view are made to the table(s) and any changes made to the table(s) are reflected in the view. ...
... • A view is more for viewing rather than updating since an update could disqualify a record from the view. • Updates made to a view are made to the table(s) and any changes made to the table(s) are reflected in the view. ...
1 - WordPress.com
... 24. What is meant by the degree of relationship set? The degree of relationship type is the number of participating entity types. 25. Define the terms i) Key attribute ii) Value set Key attribute: An entity type usually has an attribute whose values are distinct from each individual entity in the co ...
... 24. What is meant by the degree of relationship set? The degree of relationship type is the number of participating entity types. 25. Define the terms i) Key attribute ii) Value set Key attribute: An entity type usually has an attribute whose values are distinct from each individual entity in the co ...
Deductive Databases - Theory Meets Practice
... the underlying fact manager (record manager). This provides for more flexible execution modes than those provided by relational algebra [Cetal, Zanl]. The new design yields better performance, since the optimizer can now take advantage of different execution modes, and the compiler can cut out redun ...
... the underlying fact manager (record manager). This provides for more flexible execution modes than those provided by relational algebra [Cetal, Zanl]. The new design yields better performance, since the optimizer can now take advantage of different execution modes, and the compiler can cut out redun ...
Crash Recovery
... SQL allows the suspension of previously granted privileges If a privilege has propagated, and the owner account revokes it, all the propagated privileges will also be revoked Remember, this is not exactly how Oracle implements this feature If an account receives privileges from 2 or more sour ...
... SQL allows the suspension of previously granted privileges If a privilege has propagated, and the owner account revokes it, all the propagated privileges will also be revoked Remember, this is not exactly how Oracle implements this feature If an account receives privileges from 2 or more sour ...
Analyzing & Optimizing T-SQL Query Performance Part1
... S325 ▪ August 30, 2005 ▪ 9:45 AM – 11:15 AM ...
... S325 ▪ August 30, 2005 ▪ 9:45 AM – 11:15 AM ...
Database System Architectures
... n Differentiate between local and global transactions l A local transaction accesses data in the single site at which the transaction was initiated. l A global transaction either accesses data in a site different from the one at which the transaction was initiated or accesses data in several differe ...
... n Differentiate between local and global transactions l A local transaction accesses data in the single site at which the transaction was initiated. l A global transaction either accesses data in a site different from the one at which the transaction was initiated or accesses data in several differe ...
Kroenke-DBP-e10-PPT-Chapter09
... transactions that run concurrently and generate results that are consistent with the results that would have occurred if they had run separately • Two-phased locking is one of the techniques used to achieve serializability ...
... transactions that run concurrently and generate results that are consistent with the results that would have occurred if they had run separately • Two-phased locking is one of the techniques used to achieve serializability ...
Transaction Management
... Aborted, after the transaction has been rolled back and the database restored to its state prior to the start of the transaction. Two options after it has been aborted: – restart the transaction – only if no internal logical error – kill the transaction Committed, after successful completion. ...
... Aborted, after the transaction has been rolled back and the database restored to its state prior to the start of the transaction. Two options after it has been aborted: – restart the transaction – only if no internal logical error – kill the transaction Committed, after successful completion. ...
Logic Databases (Knowledge Bases)
... • ¬has-office-in(IBM,NewYork) ∈ cwae (DB) Add the extra fact has-office-in(IBM,NewYork) to DB: • ¬has-office-in(IBM,NewYork) ∈ / cwae (DB ∪ {has-office-in(IBM,NewYork)}) Notice that (1) We haven’t yet constructed the additional axioms X alluded to on the previous page that ensure DB ∪ X has a unique ...
... • ¬has-office-in(IBM,NewYork) ∈ cwae (DB) Add the extra fact has-office-in(IBM,NewYork) to DB: • ¬has-office-in(IBM,NewYork) ∈ / cwae (DB ∪ {has-office-in(IBM,NewYork)}) Notice that (1) We haven’t yet constructed the additional axioms X alluded to on the previous page that ensure DB ∪ X has a unique ...
Document
... to Ensure Serializability (continued) • Governed by the following rules: ▫ Two transactions cannot have conflicting locks ▫ No unlock operation can precede a lock operation in the same transaction ▫ No data are affected until all locks are obtained— that is, until transaction is in its locked point ...
... to Ensure Serializability (continued) • Governed by the following rules: ▫ Two transactions cannot have conflicting locks ▫ No unlock operation can precede a lock operation in the same transaction ▫ No data are affected until all locks are obtained— that is, until transaction is in its locked point ...
Chapter 15: Concurrency Control
... Select for update (SFU) treats all data read by the query as if it were also updated, preventing concurrent updates ...
... Select for update (SFU) treats all data read by the query as if it were also updated, preventing concurrent updates ...
Building Mission Critical Systems with SQL Server 2005
... application system Database upgrades should be done without outages Individual databases can be taken online/offline and maintained without application downtime ...
... application system Database upgrades should be done without outages Individual databases can be taken online/offline and maintained without application downtime ...
Navdeep`s Resume - Trelco Limited Company
... The Veerata is an ERP based Product. It provides an integrated solution to all the operational issues of services organization from business development thru post service delivery issues such as practice / portfolio management. In addition, this solution provides such functionality as yield manageme ...
... The Veerata is an ERP based Product. It provides an integrated solution to all the operational issues of services organization from business development thru post service delivery issues such as practice / portfolio management. In addition, this solution provides such functionality as yield manageme ...
Versant Object Database
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.