Description Logics and database
... result of ER modeling is usually represented in a graphical notation, which is particularly useful for an easy visualization of the data dependencies. In the commonly accepted notation, entities are represented as boxes, whereas relationships are represented as diamonds. An attribute is shown as a c ...
... result of ER modeling is usually represented in a graphical notation, which is particularly useful for an easy visualization of the data dependencies. In the commonly accepted notation, entities are represented as boxes, whereas relationships are represented as diamonds. An attribute is shown as a c ...
Application Framework Guidelines
... While the user doesn't require any supplemental information from the application to supply the order's destination shipping address, the user does need the application to provide the inventory IDs of the various items the user wants to purchase. The DNA PurchaseOrder application provides users with ...
... While the user doesn't require any supplemental information from the application to supply the order's destination shipping address, the user does need the application to provide the inventory IDs of the various items the user wants to purchase. The DNA PurchaseOrder application provides users with ...
The Application Model
... Over the past few decades, the architecture of applications, especially large enterprise, have evolved from single-tier to n-tier designs. The driving force for this change has been the following general goals: scalability, separation and encapsulation of functionality, maintainability, multi-user s ...
... Over the past few decades, the architecture of applications, especially large enterprise, have evolved from single-tier to n-tier designs. The driving force for this change has been the following general goals: scalability, separation and encapsulation of functionality, maintainability, multi-user s ...
Chap 6
... • If user is cleared for high-sensitivity data, the front end submits queries to both the high- and low-sensitivity databases • If user is not cleared for high-sensitivity data, the front end submits a query to only the lowsensitivity database ...
... • If user is cleared for high-sensitivity data, the front end submits queries to both the high- and low-sensitivity databases • If user is not cleared for high-sensitivity data, the front end submits a query to only the lowsensitivity database ...
Improving response time of database systems by
... relational database and thus obtained RDF triples. However, the obligation to know the database schema continued due to not using any mapping language. In addition, confirmative SPARQL queries could not be executed because RDF triples were not transferred to a semantic data repository [6]. The aim o ...
... relational database and thus obtained RDF triples. However, the obligation to know the database schema continued due to not using any mapping language. In addition, confirmative SPARQL queries could not be executed because RDF triples were not transferred to a semantic data repository [6]. The aim o ...
chap06
... Sorting Results with ORDER BY Clause • Sort the results first by STATE, and within a state by the CUSTOMER NAME ...
... Sorting Results with ORDER BY Clause • Sort the results first by STATE, and within a state by the CUSTOMER NAME ...
Consistent Query Answers in Inconsistent Databases
... and a fixed infinite database domain D. We also have a first order language based on this schema with names for the elements of D. We assume that elements of the domain with different names are different. The instances of the schema are finite structures for interpreting the first order language. As ...
... and a fixed infinite database domain D. We also have a first order language based on this schema with names for the elements of D. We assume that elements of the domain with different names are different. The instances of the schema are finite structures for interpreting the first order language. As ...
11. Relational Databases and SQL
... • Most databases ship with tools for opening / manipulating DB – MS Access database: use the MS Access Office product – SQL Server database: use Query Analyzer • But you can also use Visual Studio .NET! ...
... • Most databases ship with tools for opening / manipulating DB – MS Access database: use the MS Access Office product – SQL Server database: use Query Analyzer • But you can also use Visual Studio .NET! ...
DBC-e03-PP-Chapter-01
... • In a list, each row may contain information on more than one theme. As a result, needed information may appear in the lists only if information on other themes is also present – For Example: A list of Projects may include Project Manager information (Name, ID, and Phone Extension) and Project info ...
... • In a list, each row may contain information on more than one theme. As a result, needed information may appear in the lists only if information on other themes is also present – For Example: A list of Projects may include Project Manager information (Name, ID, and Phone Extension) and Project info ...
Database Security:An Introduction
... prevents information from flowing in such a way that it reaches unauthorized users. Channels that are pathways for information to flow implicitly in ways that violate the security policy of an organization are called covert channels. ...
... prevents information from flowing in such a way that it reaches unauthorized users. Channels that are pathways for information to flow implicitly in ways that violate the security policy of an organization are called covert channels. ...
Lecture 1
... specialization of types. Some objectoriented database systems use a general network model, but most have some hierarchical limitations. ...
... specialization of types. Some objectoriented database systems use a general network model, but most have some hierarchical limitations. ...
DDOS Assignment H1
... have to crash your computer and recover from real log files. You will need to simulate multiple concurrent transactions, filling log buffers with changes from a number of concurrent transactions. The after values for your log records will be the data values passed in with the operation and you can u ...
... have to crash your computer and recover from real log files. You will need to simulate multiple concurrent transactions, filling log buffers with changes from a number of concurrent transactions. The after values for your log records will be the data values passed in with the operation and you can u ...
DBC-e03-Chapter-01-PP
... • In a list, each row may contain information on more than one theme. As a result, needed information may appear in the lists only if information on other themes is also present – For Example: A list of Projects may include Project Manager information (Name, ID, and Phone Extension) and Project info ...
... • In a list, each row may contain information on more than one theme. As a result, needed information may appear in the lists only if information on other themes is also present – For Example: A list of Projects may include Project Manager information (Name, ID, and Phone Extension) and Project info ...
A mobile database is a database than can be
... computing provides the ability to access information at any time and place. The use of laptops, mobiles and PDA’s is increasing and likely to increase in the future with more and more applications residing in the mobile systems. The aim of this paper is to describe the basic query processing mechani ...
... computing provides the ability to access information at any time and place. The use of laptops, mobiles and PDA’s is increasing and likely to increase in the future with more and more applications residing in the mobile systems. The aim of this paper is to describe the basic query processing mechani ...
How to migrate from SharePoint 2010 to SharePoint 2013
... ◦ SQL 2008 R2 SP1 ◦ Recommended: OS Windows Server 2012 and SQL 2012 ◦ Developer Machine 24GB of RAM???!!!!! http://technet.microsoft.com/en-us/library/cc262485.aspx ...
... ◦ SQL 2008 R2 SP1 ◦ Recommended: OS Windows Server 2012 and SQL 2012 ◦ Developer Machine 24GB of RAM???!!!!! http://technet.microsoft.com/en-us/library/cc262485.aspx ...
Start_to_Finish_with_Azure_Data_Factory
... Run Add-AzureAccount and enter the user name and password Run Get-AzureSubscription to view all the subscriptions for this account. Run Select-AzureSubscription to select the subscription that you want to work with. Run Switch-AzureMode AzureResourceManager Run New-AzureResourceGroup -Name ADFTutori ...
... Run Add-AzureAccount and enter the user name and password Run Get-AzureSubscription to view all the subscriptions for this account. Run Select-AzureSubscription to select the subscription that you want to work with. Run Switch-AzureMode AzureResourceManager Run New-AzureResourceGroup -Name ADFTutori ...
View
... return rows where aggregate values meet the specified conditions. Example: SELECT branchno, AVG (mark) FROM student GROUP BY branchno HAVING AVG(mark) > 80; o ORDER BY specifies an order in which to return the rows. An ORDER BY clause in SQL specifies that a SQL SELECT statement returns a result set ...
... return rows where aggregate values meet the specified conditions. Example: SELECT branchno, AVG (mark) FROM student GROUP BY branchno HAVING AVG(mark) > 80; o ORDER BY specifies an order in which to return the rows. An ORDER BY clause in SQL specifies that a SQL SELECT statement returns a result set ...
Object-Oriented Databases
... particular (group of) users. • SQL is a closed query language that maps tables into tables => SQL allows very general views (derived tables) to be defined as single queries ...
... particular (group of) users. • SQL is a closed query language that maps tables into tables => SQL allows very general views (derived tables) to be defined as single queries ...
Architecture of a Database System
... the exceptions and finer nuances that have found their way into these multi-million line code bases, most of which are well over a decade old. Our goal here is to focus on overall system design and stress issues not typically discussed in textbooks, providing useful context for more widely known alg ...
... the exceptions and finer nuances that have found their way into these multi-million line code bases, most of which are well over a decade old. Our goal here is to focus on overall system design and stress issues not typically discussed in textbooks, providing useful context for more widely known alg ...
ppt
... • Definition. A query q is monotone if, for any two finite models D = (D, R1, ..., Rk) and D’ = (D’, R1’, ..., Rk’) s.t. D D’, R1 R1’, ..., Rk Rk’ we have q(D) q(D’). • Proposition. It is undecidable if a query q in FO is monotone. • Proof: why ? ...
... • Definition. A query q is monotone if, for any two finite models D = (D, R1, ..., Rk) and D’ = (D’, R1’, ..., Rk’) s.t. D D’, R1 R1’, ..., Rk Rk’ we have q(D) q(D’). • Proposition. It is undecidable if a query q in FO is monotone. • Proof: why ? ...
SQL
... SQL (Structured Query language) pronounced “sequel” Declarative language consisting of commands called SQL statements Statements usually written in CAPS Statements contain clauses – individual commands ...
... SQL (Structured Query language) pronounced “sequel” Declarative language consisting of commands called SQL statements Statements usually written in CAPS Statements contain clauses – individual commands ...
Slides 01 - University of California, Irvine
... – Query consists of algebraic composition of a few powerful operators – Equivalent to a first-order relational calculus ...
... – Query consists of algebraic composition of a few powerful operators – Equivalent to a first-order relational calculus ...
Relational model
The relational model for database management is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by Edgar F. Codd. In the relational model of a database, all data is represented in terms of tuples, grouped into relations. A database organized in terms of the relational model is a relational database.The purpose of the relational model is to provide a declarative method for specifying data and queries: users directly state what information the database contains and what information they want from it, and let the database management system software take care of describing data structures for storing the data and retrieval procedures for answering queries.Most relational databases use the SQL data definition and query language; these systems implement what can be regarded as an engineering approximation to the relational model. A table in an SQL database schema corresponds to a predicate variable; the contents of a table to a relation; key constraints, other constraints, and SQL queries correspond to predicates. However, SQL databases deviate from the relational model in many details, and Codd fiercely argued against deviations that compromise the original principles.