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Curated Databases - School of Engineering
... readable and thus amenable to data extraction tools, such as query languages that are common for databases. Socially, curated databases differ from wikis in that the curation process is usually more heavily orchestrated in the latter. However, there is much to be gained by trying to combine the bes ...
... readable and thus amenable to data extraction tools, such as query languages that are common for databases. Socially, curated databases differ from wikis in that the curation process is usually more heavily orchestrated in the latter. However, there is much to be gained by trying to combine the bes ...
Optimizing select-project
... body of C1 . This implies that the first subgoal of C2 must be mapped onto the first subgoal of C1 (since this is the only subgoal where x occurs in the first column), and hence, that h must map y 7→ y. Analogously, this implies that the second subgoal of C2 must be mapped to the second subgoal of C ...
... body of C1 . This implies that the first subgoal of C2 must be mapped onto the first subgoal of C1 (since this is the only subgoal where x occurs in the first column), and hence, that h must map y 7→ y. Analogously, this implies that the second subgoal of C2 must be mapped to the second subgoal of C ...
Role Based Access Control
... Include here anything you might want us to know when grading your project. To turn in your project, ssh to lore.cs.purdue.edu, create a folder named project3 in your home directory and copy RBAC.java and your README file to that folder. After copying your files in the folder project3, execute the fo ...
... Include here anything you might want us to know when grading your project. To turn in your project, ssh to lore.cs.purdue.edu, create a folder named project3 in your home directory and copy RBAC.java and your README file to that folder. After copying your files in the folder project3, execute the fo ...
OGSA-DAI-RDF & Its Ontology Interfaces Isao Kojima and Masahiro Kimoto
... Import of NCI cancer ontology using the Activity Framework 1. Create a Model on RDB using RDF Collection(model)Management Activity 2. Get the data from the NCI site using the OGSA-DAI deliverFromActivity 3. Uncompress the file using the OGSA-DAI gZip Activity 4. Load the data with our RDF BulkLoad A ...
... Import of NCI cancer ontology using the Activity Framework 1. Create a Model on RDB using RDF Collection(model)Management Activity 2. Get the data from the NCI site using the OGSA-DAI deliverFromActivity 3. Uncompress the file using the OGSA-DAI gZip Activity 4. Load the data with our RDF BulkLoad A ...
A SQL:1999 Code Generator for the Pathfinder XQuery
... kernel. Pathfinder, a retargetable front-end compiler, translates input XQuery expressions into DAG-shaped relational algebra plans. The code generator then turns these plans into sequences of either SQL:1999 statements or view definitions which jointly implement the (sometimes intricate) XQuery sem ...
... kernel. Pathfinder, a retargetable front-end compiler, translates input XQuery expressions into DAG-shaped relational algebra plans. The code generator then turns these plans into sequences of either SQL:1999 statements or view definitions which jointly implement the (sometimes intricate) XQuery sem ...
Document
... and only if there exists some item Q accessed by both li and lj, and at least one of these instructions wrote Q. 1. li = read(Q), lj = read(Q). 2. li = read(Q), lj = write(Q). 3. li = write(Q), lj = read(Q). ...
... and only if there exists some item Q accessed by both li and lj, and at least one of these instructions wrote Q. 1. li = read(Q), lj = read(Q). 2. li = read(Q), lj = write(Q). 3. li = write(Q), lj = read(Q). ...
cs764 project report - Pages - University of Wisconsin–Madison
... of NO_FIELDS integers. Each field in the tuple is 4 bytes long. In this way, we can simulate relations consisting of any number of tuples and any number of fields in each tuple. In our implementation, the main memory database system uses UNIX threads (POSIX) to represent transactions. Each thread st ...
... of NO_FIELDS integers. Each field in the tuple is 4 bytes long. In this way, we can simulate relations consisting of any number of tuples and any number of fields in each tuple. In our implementation, the main memory database system uses UNIX threads (POSIX) to represent transactions. Each thread st ...
WWWTranscribe - A MODULAR TRANSCRIPTION SYSTEM BASED
... WWWTranscribe depends on the client-server communication via http and TCP/IP. However, it can be used on computers without physical network access if both the server and the client reside on the same machine and can communicate (usually over a virtual network connection). On most platforms this will ...
... WWWTranscribe depends on the client-server communication via http and TCP/IP. However, it can be used on computers without physical network access if both the server and the client reside on the same machine and can communicate (usually over a virtual network connection). On most platforms this will ...
Transactions
... the sake of database consistency, and preferably cascadeless. A policy in which only one transaction can execute at a time generates serial schedules, but provides a poor degree of concurrency.. Concurrency-control schemes tradeoff between the amount of concurrency they allow and the amount of overh ...
... the sake of database consistency, and preferably cascadeless. A policy in which only one transaction can execute at a time generates serial schedules, but provides a poor degree of concurrency.. Concurrency-control schemes tradeoff between the amount of concurrency they allow and the amount of overh ...
Query-by-Example (QBE) - gozips.uakron.edu
... Calculating Statistics Built-in statistics (called aggregate functions in ...
... Calculating Statistics Built-in statistics (called aggregate functions in ...
208_Summarization CS 257
... Then, repeatedly select a subgoal that can be resolved. Let Rα(a1, a2, …, an) be the subgoal: Wherever α has a b, we shall find the argument in R is a constant, or a variable in the schema of R. Project X onto its variables that appear in R. ...
... Then, repeatedly select a subgoal that can be resolved. Let Rα(a1, a2, …, an) be the subgoal: Wherever α has a b, we shall find the argument in R is a constant, or a variable in the schema of R. Project X onto its variables that appear in R. ...
JDBC Stands for Java Database Connectivity, is an API specification
... 4. Low-cost database solution where you have an ODBC driver Limitations: 1. Bridge was developed as a prototyping and marketing tool and one should not use it for mission-critical application if native JDBC driver is available. 2. Bridge uses C language code so can not be used in untrusted applets. ...
... 4. Low-cost database solution where you have an ODBC driver Limitations: 1. Bridge was developed as a prototyping and marketing tool and one should not use it for mission-critical application if native JDBC driver is available. 2. Bridge uses C language code so can not be used in untrusted applets. ...
NNM Data Warehouse and Remote Database Connectivity
... NNM Data Warehouse and Remote Database Connectivity The default configuration of NNM’s data warehouse to an external database assumes a database installed on the same machine as NNM. While this configuration is often adequate, there are circumstances that would make the separation of the NNM applica ...
... NNM Data Warehouse and Remote Database Connectivity The default configuration of NNM’s data warehouse to an external database assumes a database installed on the same machine as NNM. While this configuration is often adequate, there are circumstances that would make the separation of the NNM applica ...
Data Management Layer Design (II)
... They are better in handling complex data (allow storing Composite Objects) – in a RDBMS we would either have to define a table with many columns and a lot of null values, or a set of tables linked via foreign keys (querying would have joins) ...
... They are better in handling complex data (allow storing Composite Objects) – in a RDBMS we would either have to define a table with many columns and a lot of null values, or a set of tables linked via foreign keys (querying would have joins) ...
An SQL API for Object Oriented Perl
... • $query->execute() returns a “statement accessor” (like a DBI statement handle). • $sta iterates over row objects, each of which has accessors for each query value, gbytes and collection. ...
... • $query->execute() returns a “statement accessor” (like a DBI statement handle). • $sta iterates over row objects, each of which has accessors for each query value, gbytes and collection. ...
Fundamentals, Design, and Implementation, 9/e DATABASE
... Implicit locks are locks placed by the DBMS. Most locking today is implicit, application need to mention. Explicit locks are issued by the application program Lock granularity refers to size of a locked resource – Rows, page, table, and database level – Large granularity is easy to manage but ...
... Implicit locks are locks placed by the DBMS. Most locking today is implicit, application need to mention. Explicit locks are issued by the application program Lock granularity refers to size of a locked resource – Rows, page, table, and database level – Large granularity is easy to manage but ...
Setting up Veritas Cluster Server (VCS)
... would be some option that could automatically detect and recover from a server disaster. It would also be best to avoid creating custom solutions that rely on unproven scripts or monitoring programs. These stringent requirements are addressed by an architecture commonly called “HA,” for High Availab ...
... would be some option that could automatically detect and recover from a server disaster. It would also be best to avoid creating custom solutions that rely on unproven scripts or monitoring programs. These stringent requirements are addressed by an architecture commonly called “HA,” for High Availab ...
(Student#).
... Use field properties to help maintain data integrity When possible limit the possible entries in a field to a lookup list (domain) Choose your key fields carefully Index fields that you will search often Many-to-many relationships in Access Steal - link to existing tables ...
... Use field properties to help maintain data integrity When possible limit the possible entries in a field to a lookup list (domain) Choose your key fields carefully Index fields that you will search often Many-to-many relationships in Access Steal - link to existing tables ...
Lecture 10, Database Usage 3
... then a booking for a room that was listed as free will always succeed, and transactions must wait for other transactions to finish. In the min-max example, we always get a value that is correct at some point in time, either before or after the ...
... then a booking for a room that was listed as free will always succeed, and transactions must wait for other transactions to finish. In the min-max example, we always get a value that is correct at some point in time, either before or after the ...
Synchronization and replication in the context of mobile applications
... case in mobile applications. [10] In the distributed systems community, software based replication, which is being described here, is seen as a cost effective way to increase availability. In the database community, however, replication is used for both performance and fault-tolerant purposes. [7] R ...
... case in mobile applications. [10] In the distributed systems community, software based replication, which is being described here, is seen as a cost effective way to increase availability. In the database community, however, replication is used for both performance and fault-tolerant purposes. [7] R ...
Java Database Connectivity with JDBC
... Author’s ID number in the database. In the books database, this integer column is defined as autoincremented. For each row inserted in this table, the database automatically increments the authorID value to ensure that each row has a unique authorID. This column represents the table’s primary key. f ...
... Author’s ID number in the database. In the books database, this integer column is defined as autoincremented. For each row inserted in this table, the database automatically increments the authorID value to ensure that each row has a unique authorID. This column represents the table’s primary key. f ...
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.