DB-Infrastructure-for-Semantic-Data
... • Also SQL constructs can be used for operating on semantic data • Existing database users interested in exploring semantics to enhance their applications ...
... • Also SQL constructs can be used for operating on semantic data • Existing database users interested in exploring semantics to enhance their applications ...
Object - ShareStudies.com
... One of the most critical tasks that applications have to perform is to save and restore data Persistence is the storage of data from working memory so that it can be restored when the application is run again In object-oriented systems, there are several ways in which objects can be made persi ...
... One of the most critical tasks that applications have to perform is to save and restore data Persistence is the storage of data from working memory so that it can be restored when the application is run again In object-oriented systems, there are several ways in which objects can be made persi ...
Knowledge Management for Database Interoperability
... translation tasks at the component sites. At the Integration/Knowledge Reconciliation site, users are presented with integrated views/schemas for accessing multiple data sources in a uniform data model and query language. The resolution of conflicts at component and integration sites requires acquir ...
... translation tasks at the component sites. At the Integration/Knowledge Reconciliation site, users are presented with integrated views/schemas for accessing multiple data sources in a uniform data model and query language. The resolution of conflicts at component and integration sites requires acquir ...
Validation of Mappings Between Data Models
... We have also proposed and formalized two additional properties: mapping satisfiability and mapping losslessness. • Mapping inference allows us to check for redundant mapping formulas. • Mapping losslessness allows us to check whether some data is captured by mapping. It is a generalization of quer ...
... We have also proposed and formalized two additional properties: mapping satisfiability and mapping losslessness. • Mapping inference allows us to check for redundant mapping formulas. • Mapping losslessness allows us to check whether some data is captured by mapping. It is a generalization of quer ...
Views - NTOU 》資料庫實驗室
... Let be a set of attributes. Let R and S be two relations that contain attributes , where is the primary key of S. is said to be a foreign key of R if for any values of appearing in R these values also appear in S. R is the referencing relation and S is the referenced relation. When a ...
... Let be a set of attributes. Let R and S be two relations that contain attributes , where is the primary key of S. is said to be a foreign key of R if for any values of appearing in R these values also appear in S. R is the referencing relation and S is the referenced relation. When a ...
Idaho1 - University of Tulsa
... Placing very severe restrictions on intermixing of types Variety of definitions for it ...
... Placing very severe restrictions on intermixing of types Variety of definitions for it ...
Database Reorganization
... appear at the bottom. Rectangles presented primarily for pedagogic purposes, but it can also illustrate data indepen- represent constructs at the various levels, dence; i.e., changes in constructs at low while ovals represent interlevel mappings levels do not affect constructs at high levels, betwee ...
... appear at the bottom. Rectangles presented primarily for pedagogic purposes, but it can also illustrate data indepen- represent constructs at the various levels, dence; i.e., changes in constructs at low while ovals represent interlevel mappings levels do not affect constructs at high levels, betwee ...
BCA Syllabus - Shri Jain Post Graduate College
... Inheritance: Defining derived class, single inheritance, multilevel inheritance, multiple inheritance, hierarchical inheritance, hybrid inheritance, virtual base class, abstract base class, constructor in derived class, nesting of classes, templates. Unit V The C++ I/O system, basics of C++ streams, ...
... Inheritance: Defining derived class, single inheritance, multilevel inheritance, multiple inheritance, hierarchical inheritance, hybrid inheritance, virtual base class, abstract base class, constructor in derived class, nesting of classes, templates. Unit V The C++ I/O system, basics of C++ streams, ...
transactions_and_recovery
... [start,]: the start of the
execution of the transaction identified
by transaction-id
[read, , X]: the
transaction identified by transaction-id
reads the value of database item X
[write, , X, old-value,
new-value]: the transaction identified by
transac ...
... [start,
Lecture 4
... Citations can refer to any specific creation but for journals usually refer to the work. ...
... Citations can refer to any specific creation but for journals usually refer to the work. ...
Optimizing SQL
... Problem: The planner has decided its faster to do a table scan than an index scan : This can happen if a) your table is relatively small, or the field you are indexing has a lot of duplicates. Solution: Case in point, boolean fields are not terribly useful to index since 50% of your data is one thin ...
... Problem: The planner has decided its faster to do a table scan than an index scan : This can happen if a) your table is relatively small, or the field you are indexing has a lot of duplicates. Solution: Case in point, boolean fields are not terribly useful to index since 50% of your data is one thin ...
Performance Matters
... hardware setup has to be tuned properly. The server requires fast CPU and plenty of memory, but the bottleneck is often the disk system. Queries against a large analysis services cube can produce a very large number of disk IOPS and create disk queues – which essentially means wait-time for the user ...
... hardware setup has to be tuned properly. The server requires fast CPU and plenty of memory, but the bottleneck is often the disk system. Queries against a large analysis services cube can produce a very large number of disk IOPS and create disk queues – which essentially means wait-time for the user ...
From Conceptual Model to Relational Model
... database model 2. Grouping attributes from the logical database model into physical records 3. Arranging related records in secondary memory (hard disks and magnetic tapes) so that records can be stored, retrieved and updated rapidly 4. Selecting media and structures for storing data to make acce ...
... database model 2. Grouping attributes from the logical database model into physical records 3. Arranging related records in secondary memory (hard disks and magnetic tapes) so that records can be stored, retrieved and updated rapidly 4. Selecting media and structures for storing data to make acce ...
Distributed Database
... • Single memory address-space for all processors • Reading or writing to far memory can be slightly more expensive ...
... • Single memory address-space for all processors • Reading or writing to far memory can be slightly more expensive ...
SS-L7.6 (pg. 5349)
... little read-modify-write and where statistical consistency is more than adequate. Under these the relaxed restrictions there is potential to get a sizable increase in performance. These databases are typically “NoSQL” databases that have their own custom interfaces. D4M associative arrays provide a ...
... little read-modify-write and where statistical consistency is more than adequate. Under these the relaxed restrictions there is potential to get a sizable increase in performance. These databases are typically “NoSQL” databases that have their own custom interfaces. D4M associative arrays provide a ...
Chandraleela Karnati-JAVA
... Analyzed use cases, created interfaces and designed the core functionality from presentation layer to business logic layer using UML. Actively participated in design and technical discussions. ...
... Analyzed use cases, created interfaces and designed the core functionality from presentation layer to business logic layer using UML. Actively participated in design and technical discussions. ...
Transforming Heterogeneous Data with Database Middleware
... wrapper architecture tries to minimize the required transformations, but wrappers can do more if desired. The schemas of individual repositories are merged into the global schema via a wrapper registration step. In this step, wrappers model their data as Garlic objects, and provide an interface defi ...
... wrapper architecture tries to minimize the required transformations, but wrappers can do more if desired. The schemas of individual repositories are merged into the global schema via a wrapper registration step. In this step, wrappers model their data as Garlic objects, and provide an interface defi ...
Constructing Integrated Clinical Information Systems for Traditional and Nontraditional Users
... the ability to use data stored in data structures other than a SAS dataset, for example data stored in another database management system (DBMS). Prior to Version 6.06, one had to extract data from a DBMS and create SAS datasets before the SAS system could use the data (Figure 3). This extra step of ...
... the ability to use data stored in data structures other than a SAS dataset, for example data stored in another database management system (DBMS). Prior to Version 6.06, one had to extract data from a DBMS and create SAS datasets before the SAS system could use the data (Figure 3). This extra step of ...
Chapter 1
... Nature of Relational Databases • All data, even data about data such as a table and column names, are stored in tables. • Each row in a table should have a column (or columns) that uniquely identifies it, a primary key. • This primary key is repeated in other tables to create a relationship. • When ...
... Nature of Relational Databases • All data, even data about data such as a table and column names, are stored in tables. • Each row in a table should have a column (or columns) that uniquely identifies it, a primary key. • This primary key is repeated in other tables to create a relationship. • When ...
Oracle Seminars - Database design and Basic SQL - Indico
... Some limited dedicated tests of Oracle streams (online -> offline, CERN -> RAL -> Oxford) using COOL as example application Achieving rates of 10-30 MB/minute in these tests (combined LCG 3D/ATLAS effort) ...
... Some limited dedicated tests of Oracle streams (online -> offline, CERN -> RAL -> Oxford) using COOL as example application Achieving rates of 10-30 MB/minute in these tests (combined LCG 3D/ATLAS effort) ...
BWDB2UG March 8 2017 DB2 11 and 12 Performance and Availability
... With every new release of DB2 we look to see what features will allow us to improve the capabilities and performance of our existing applications as well as the availability of our data. We also have to plan to utilize new features in our development efforts. This presentation takes a look at the fe ...
... With every new release of DB2 we look to see what features will allow us to improve the capabilities and performance of our existing applications as well as the availability of our data. We also have to plan to utilize new features in our development efforts. This presentation takes a look at the fe ...