Nuværende produktnavn i Middeldatabasen 50724 AB Aclonifen
... Micro loans are small loans, which is beginning to gain popularity especially among borrowers in developing countries. The idea is to bring venture lenders together using information technology. Typically, the loans will be used to finance startup or development of the borrower’s company, so that th ...
... Micro loans are small loans, which is beginning to gain popularity especially among borrowers in developing countries. The idea is to bring venture lenders together using information technology. Typically, the loans will be used to finance startup or development of the borrower’s company, so that th ...
Database Performance Study - Information Systems Department
... One conclusion that can be drawn, however, is that database tuning requires very broad skills and comprises the fields of system administration, database administration and application development. While SQL optimization is the primary focus of this research, the authors cannot stress enough how imp ...
... One conclusion that can be drawn, however, is that database tuning requires very broad skills and comprises the fields of system administration, database administration and application development. While SQL optimization is the primary focus of this research, the authors cannot stress enough how imp ...
PPT - Courses - University of California, Berkeley
... referenced table (parent) if there are matching rows in the referencing table (child). • Three ways to handle this – Restrict -- disallow the delete – Nullify -- reset the foreign keys in the child to some NULL or dummy value – Cascade -- Delete all rows in the child where there is a foreign key mat ...
... referenced table (parent) if there are matching rows in the referencing table (child). • Three ways to handle this – Restrict -- disallow the delete – Nullify -- reset the foreign keys in the child to some NULL or dummy value – Cascade -- Delete all rows in the child where there is a foreign key mat ...
Consistent Query Answering in Databases
... In the iteration process to determine Tω (Q) nothing syntactically new is obtained beyond some finite step There are sufficient conditions for semantic termination From some finite step on, only logically equivalent formulas are obtained In these favorable cases, a FO SQL query can be translated into a ...
... In the iteration process to determine Tω (Q) nothing syntactically new is obtained beyond some finite step There are sufficient conditions for semantic termination From some finite step on, only logically equivalent formulas are obtained In these favorable cases, a FO SQL query can be translated into a ...
Chapter 1: Introduction
... Permits definition of procedures in SQL, with if-then-else statements, for and while loops, etc. ...
... Permits definition of procedures in SQL, with if-then-else statements, for and while loops, etc. ...
Terminological aspects of text retrieval
... • Methods to solve the problem, at the time of database production: »adding subject descriptors in various languages (for instance in Pascal and Francis made by INIST) »adding abstracts in various languages (for instance the abstracts in English in INSPEC) »translation of the complete contents of th ...
... • Methods to solve the problem, at the time of database production: »adding subject descriptors in various languages (for instance in Pascal and Francis made by INIST) »adding abstracts in various languages (for instance the abstracts in English in INSPEC) »translation of the complete contents of th ...
Advanced Databases
... Fully functional DBMS in each node Transaction can no longer be viewed as (only) a series of logically related operations that are executed in a DBMS Global transaction is a set of coordinated subtransaction executed at multiple nodes that transform distributed database from one consistent state to ...
... Fully functional DBMS in each node Transaction can no longer be viewed as (only) a series of logically related operations that are executed in a DBMS Global transaction is a set of coordinated subtransaction executed at multiple nodes that transform distributed database from one consistent state to ...
Database System Concepts
... An expression such as “head–>name” is called a path expression Path expressions help avoid explicit joins ...
... An expression such as “head–>name” is called a path expression Path expressions help avoid explicit joins ...
Chapter 21:Application Development and Administration
... An expression such as “head–>name” is called a path expression Path expressions help avoid explicit joins ...
... An expression such as “head–>name” is called a path expression Path expressions help avoid explicit joins ...
Chapter 21:Application Development and Administration
... An expression such as “head–>name” is called a path expression Path expressions help avoid explicit joins ...
... An expression such as “head–>name” is called a path expression Path expressions help avoid explicit joins ...
extended version - Department of Computer Science, University of
... in the context of the MystiQ [5] and SPROUT [11] probabilistic database systems show performance for tractable queries over probabilistic databases close to that for queries over classical deterministic databases. The second avenue is to develop techniques that approximate the probabilities of the ...
... in the context of the MystiQ [5] and SPROUT [11] probabilistic database systems show performance for tractable queries over probabilistic databases close to that for queries over classical deterministic databases. The second avenue is to develop techniques that approximate the probabilities of the ...
Chapter 1: Introduction
... Permits definition of procedures in SQL, with if-then-else statements, for and while loops, etc. ...
... Permits definition of procedures in SQL, with if-then-else statements, for and while loops, etc. ...
Document
... times it was derived l On insert of a tuple to r, if the resultant tuple is already in A(r) we increment its count, else we add a new tuple with count = 1 n ...
... times it was derived l On insert of a tuple to r, if the resultant tuple is already in A(r) we increment its count, else we add a new tuple with count = 1 n ...
slides
... Problems with databases are usually a result of having attributes in the wrong tables The solution usually involves moving attributes to different tables and creating additional tables The GCUTours database is fairly well normalised, so we’ll look at some other examples, based on an IT Consultancy c ...
... Problems with databases are usually a result of having attributes in the wrong tables The solution usually involves moving attributes to different tables and creating additional tables The GCUTours database is fairly well normalised, so we’ll look at some other examples, based on an IT Consultancy c ...
Overview of Different Types of Values
... • Discussed many times – How do we avoid double, triple, quadruple counting? • Is that important for the Indicator work? • Do we really need a common metric ($)? • What do private landowners and public land managers respond to? ...
... • Discussed many times – How do we avoid double, triple, quadruple counting? • Is that important for the Indicator work? • Do we really need a common metric ($)? • What do private landowners and public land managers respond to? ...
Lecture6
... Database System Concepts, 6th Ed. ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use ...
... Database System Concepts, 6th Ed. ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use ...
transaction
... • A transaction must have the ACID properties: – A: Either it is done in total or it is not done at all (Atomicity) – C: The database moves from one consistent state to an other consistent state (Consistency) – I: If more operations are accessing the same that, they are not to disturb each other – t ...
... • A transaction must have the ACID properties: – A: Either it is done in total or it is not done at all (Atomicity) – C: The database moves from one consistent state to an other consistent state (Consistency) – I: If more operations are accessing the same that, they are not to disturb each other – t ...
Relational Databases - CSE Buffalo
... each operator takes one or two relations as arguments and returns a relation as the result operators can be nested to form expressions procedural query language: expressions describe how the query can be ...
... each operator takes one or two relations as arguments and returns a relation as the result operators can be nested to form expressions procedural query language: expressions describe how the query can be ...
Insert Title Here
... Make it hard to specify and understand joins Make it hard to aggregate (count, sum, etc.) Have different meanings: • Attribute does not apply to this tuple • Attribute value is unkown • Value is known but absent (not yet recorded) – Causes problems with queries (can’t interpret query answers) ...
... Make it hard to specify and understand joins Make it hard to aggregate (count, sum, etc.) Have different meanings: • Attribute does not apply to this tuple • Attribute value is unkown • Value is known but absent (not yet recorded) – Causes problems with queries (can’t interpret query answers) ...
Introduction to DB
... Drawbacks of Using File Systems to Store Data Data redundancy and inconsistency ...
... Drawbacks of Using File Systems to Store Data Data redundancy and inconsistency ...
Programmable Order-Preserving Secure Index for
... The form of the expressions is public, however the coefficients a and b are kept secret (not known by attackers). Based on the linear expressions, the indexing scheme maps an input value v to a ∗ v + b + noise, where noise is a random value. The noise is carefully selected, such that the order of inp ...
... The form of the expressions is public, however the coefficients a and b are kept secret (not known by attackers). Based on the linear expressions, the indexing scheme maps an input value v to a ∗ v + b + noise, where noise is a random value. The noise is carefully selected, such that the order of inp ...
KorthDB6_ch2
... Database System Concepts, 6th Ed. ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use ...
... Database System Concepts, 6th Ed. ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use ...
On the Information Content of Semi-Structured
... flat relational model, and in the sequel we will define suitable restrictions of hypernode databases that allow us to model flat, nested and object databases. Due to the flexibility of data modelling in a semi-structured environment, in any given application there may be different ways in which to e ...
... flat relational model, and in the sequel we will define suitable restrictions of hypernode databases that allow us to model flat, nested and object databases. Due to the flexibility of data modelling in a semi-structured environment, in any given application there may be different ways in which to e ...
Curated Databases - School of Engineering
... characteristics that may challenge some of our precepts of how a database functions: Source. The majority of curated data is data that is copied and edited from existing sources, perhaps other curated databases or printed articles. Often, the closest one may get to “source” data is an opinion of the ...
... characteristics that may challenge some of our precepts of how a database functions: Source. The majority of curated data is data that is copied and edited from existing sources, perhaps other curated databases or printed articles. Often, the closest one may get to “source” data is an opinion of the ...