Consistency Constraints in Database Middleware
... ❐ needs of applications using the data restricted by the constraint. Data source capabilities determine the possibilities for checking constraints and reacting to inconsistencies. With regard to checking, the spectrum is defined by the following capabilities: (1) the data source is able to notify th ...
... ❐ needs of applications using the data restricted by the constraint. Data source capabilities determine the possibilities for checking constraints and reacting to inconsistencies. With regard to checking, the spectrum is defined by the following capabilities: (1) the data source is able to notify th ...
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 ...
XML Presentation ()
... relational databases) We model the data as semistructured to facilitate exchange and integration Users see an integrated semistructured view that they can query Queries are eventually reformulated into queries over the structured resources (e.g. SQL) Only results need to be materialized ...
... relational databases) We model the data as semistructured to facilitate exchange and integration Users see an integrated semistructured view that they can query Queries are eventually reformulated into queries over the structured resources (e.g. SQL) Only results need to be materialized ...
Title
... L2 data cache misses and L1 instruction cache misses are significant [Ailamaki et al 99] 2 to 5 times the CPI of SPECInt workloads EDGE Workshop 2006 ...
... L2 data cache misses and L1 instruction cache misses are significant [Ailamaki et al 99] 2 to 5 times the CPI of SPECInt workloads EDGE Workshop 2006 ...
ppt
... Query a view as if it were a base table. Also: a limited ability to modify views if it makes sense as a modification of one underlying base table. ...
... Query a view as if it were a base table. Also: a limited ability to modify views if it makes sense as a modification of one underlying base table. ...
R - CSE, IIT Bombay
... else for each non-empty subset S1 of S such that S1 S P1= findbestplan(S1) P2= findbestplan(S - S1) A = best algorithm for joining results of P1 and P2 cost = P1.cost + P2.cost + cost of A if cost < bestplan[S].cost bestplan[S].cost = cost bestplan[S].plan = “execute P1.plan; execute P2.plan; join ...
... else for each non-empty subset S1 of S such that S1 S P1= findbestplan(S1) P2= findbestplan(S - S1) A = best algorithm for joining results of P1 and P2 cost = P1.cost + P2.cost + cost of A if cost < bestplan[S].cost bestplan[S].cost = cost bestplan[S].plan = “execute P1.plan; execute P2.plan; join ...
Rational ClearQuest Performance Improvement Rational Software Whitepaper
... Particular attention needs to be paid to the use of hook code within the schema – particularly if you hooks are implemented in perl as opposed to VBScript. You generally have a choice on whether to use perl or VBScript for your Rational ClearQuest hooks. There are limitations, however, which may for ...
... Particular attention needs to be paid to the use of hook code within the schema – particularly if you hooks are implemented in perl as opposed to VBScript. You generally have a choice on whether to use perl or VBScript for your Rational ClearQuest hooks. There are limitations, however, which may for ...
Reading Report 2 - Informatics Homepages Server
... (2) Enumerate all two-way join plans using the access plans as building blocks. also enumerate alternative join plans for all relevant sites, (3) Build three-way join plans, using access-plans and two-way join plans as building blocks. (4) Continues in this way until has enumerated all n-way join pl ...
... (2) Enumerate all two-way join plans using the access plans as building blocks. also enumerate alternative join plans for all relevant sites, (3) Build three-way join plans, using access-plans and two-way join plans as building blocks. (4) Continues in this way until has enumerated all n-way join pl ...
Data Model as an Architectural View
... In the early 1980s, relational database management systems became popular. Not coincidentally, at the same time, data modeling techniques and the Information Engineering approach [Martin 1989] became common practice in many organizations. Since then many organizations that have a family of informati ...
... In the early 1980s, relational database management systems became popular. Not coincidentally, at the same time, data modeling techniques and the Information Engineering approach [Martin 1989] became common practice in many organizations. Since then many organizations that have a family of informati ...
Spatial Data Storage and Topology in the Redesigned MAF/TIGER
... rules described above, is the isolated node. This is a point that does not have any attached edges. An isolated node might be used to represent a housing unit, a nursing home, or a mountain peak. It is commonly required to identify the relationships between these isolated nodes and other spatial fea ...
... rules described above, is the isolated node. This is a point that does not have any attached edges. An isolated node might be used to represent a housing unit, a nursing home, or a mountain peak. It is commonly required to identify the relationships between these isolated nodes and other spatial fea ...
Database semantic integrity for a network data manager
... Not all of the features identified above are offered by each of the reviewed systems. Moreover, substantial differences exist in the implementation of features common to two or more systems. Brodie's approach has not yet been implemented. McLeod's has been partially implemented. System R has not bee ...
... Not all of the features identified above are offered by each of the reviewed systems. Moreover, substantial differences exist in the implementation of features common to two or more systems. Brodie's approach has not yet been implemented. McLeod's has been partially implemented. System R has not bee ...
Slide 1
... • Program can generate SQL statements at run time that are required to respond to ad hoc queries • Attribute list and the condition are not known until the end user specifies them • Tends to be much slower than static SQL • Requires more computer resources Database Systems: Design, Implementation, & ...
... • Program can generate SQL statements at run time that are required to respond to ad hoc queries • Attribute list and the condition are not known until the end user specifies them • Tends to be much slower than static SQL • Requires more computer resources Database Systems: Design, Implementation, & ...
javaEE_L_004
... ORM stands for Object-Relational Mapping (ORM) is a programming technique for converting data between relational databases and object oriented programming languages such as Java, C# etc Advantages Lets business code access objects rather than DB tables. Hides details of SQL queries from OO logic ...
... ORM stands for Object-Relational Mapping (ORM) is a programming technique for converting data between relational databases and object oriented programming languages such as Java, C# etc Advantages Lets business code access objects rather than DB tables. Hides details of SQL queries from OO logic ...
Invisible Loading: Access-Driven Data Transfer
... determines which HDFS file splits and attributes have been loaded into the database system. If the required data is already loaded, the IL job self-configures to read its input from the database system. Since data in the database system are pre-parsed, the IL job simply replaces the Parser object wi ...
... determines which HDFS file splits and attributes have been loaded into the database system. If the required data is already loaded, the IL job self-configures to read its input from the database system. Since data in the database system are pre-parsed, the IL job simply replaces the Parser object wi ...
Paper - IEEE HPEC
... As a result, optimizing data retrieval in a NoSQL system can be challenging. Developers must design a row key scheme, decide which optimizations to employ, and write queries that efficiently scan tables. Because distributed systems are complex, bottlenecks can be difficult to predict and identify. M ...
... As a result, optimizing data retrieval in a NoSQL system can be challenging. Developers must design a row key scheme, decide which optimizations to employ, and write queries that efficiently scan tables. Because distributed systems are complex, bottlenecks can be difficult to predict and identify. M ...
Relational Database Systems 1
... • Example: store following information in a RDB – a hero called Ms. Marvel has the powers to fly and shoot energy bursts out of her hands – another hero also called Ms. Marvel has the powers of super human strength and durability – problem: how to store this information in tables (in an extensible a ...
... • Example: store following information in a RDB – a hero called Ms. Marvel has the powers to fly and shoot energy bursts out of her hands – another hero also called Ms. Marvel has the powers of super human strength and durability – problem: how to store this information in tables (in an extensible a ...
grant
... relations, of which the most important are: 1. SELECT = the right to query the relation. (READ) 2. INSERT = the right to insert tuples into the relation – may refer to one attribute, in which case the privilege is to specify only one column of the inserted tuple. 3. DELETE = the right to delete tupl ...
... relations, of which the most important are: 1. SELECT = the right to query the relation. (READ) 2. INSERT = the right to insert tuples into the relation – may refer to one attribute, in which case the privilege is to specify only one column of the inserted tuple. 3. DELETE = the right to delete tupl ...
Second Normal Form - Department of Computer Science
... IMPORTANT USE FOR THIS: To determine if A is a superkey, we compute A+, the set of attributes functionally dependent on A. If A+ consists of ALL the attributes in the relation, then A is a superkey HOW DO WE FIND A+? The following algorithm does the trick! ...
... IMPORTANT USE FOR THIS: To determine if A is a superkey, we compute A+, the set of attributes functionally dependent on A. If A+ consists of ALL the attributes in the relation, then A is a superkey HOW DO WE FIND A+? The following algorithm does the trick! ...
Multimedia Database
... News-On-Demand Video-On-Demand Music Database Telemedicine Geographic Information System ...
... News-On-Demand Video-On-Demand Music Database Telemedicine Geographic Information System ...
Document in
... attributes. To provide this the proposed system integrates content based and spatial query methods in order to enable searching for images by arrangements of regions. The objective of content based visual query (CBVQ) is to retrieve the images that are most similar to the user’s query image by perfo ...
... attributes. To provide this the proposed system integrates content based and spatial query methods in order to enable searching for images by arrangements of regions. The objective of content based visual query (CBVQ) is to retrieve the images that are most similar to the user’s query image by perfo ...
Programmable Order-Preserving Secure Index for
... enterprise may not have database professionals who know the techniques [9] for data distribution modeling. In addition, the scheme [2] can only deal with plaintexts in a finite domain. The cryptographic study of the order-preserving encryption scheme is done in [3]. The work [1] shows a way of buildi ...
... enterprise may not have database professionals who know the techniques [9] for data distribution modeling. In addition, the scheme [2] can only deal with plaintexts in a finite domain. The cryptographic study of the order-preserving encryption scheme is done in [3]. The work [1] shows a way of buildi ...
Query-based Data Warehousing Tool
... Data warehouse system is a collection of data used for decisionmaking. The success of data warehouses implementation for business intelligence activities implies an increasing demand for new concepts and solutions [1]. It includes growth across Permission to make digital or hard copies of all or par ...
... Data warehouse system is a collection of data used for decisionmaking. The success of data warehouses implementation for business intelligence activities implies an increasing demand for new concepts and solutions [1]. It includes growth across Permission to make digital or hard copies of all or par ...
Demeter in the Database
... Let us think about a model of Consumption & Replenish. Suppose a place has many consumers where each consumer eats up consumables and as a result, produces something of value. The 'consumable-tovaluething' ratio might then be like a unit cost. If you like Jack and the beanstalk, then maybe consumabl ...
... Let us think about a model of Consumption & Replenish. Suppose a place has many consumers where each consumer eats up consumables and as a result, produces something of value. The 'consumable-tovaluething' ratio might then be like a unit cost. If you like Jack and the beanstalk, then maybe consumabl ...
Creating a Data Warehouse using SQL Server
... contains information about a fictitious book distribution company. An ER diagram of the Pubs database can be found in appendix A. There is information about publishers, authors, titles, stores, sales, and more. If we are to believe that this is the database of a book distribution company then some o ...
... contains information about a fictitious book distribution company. An ER diagram of the Pubs database can be found in appendix A. There is information about publishers, authors, titles, stores, sales, and more. If we are to believe that this is the database of a book distribution company then some o ...