A Direct Approach to Physical Data Vault Design
... as well as the modeling of small parts of the data model, without the need for redesign. Sixth Normal Form (6NF) is a term used in relational database theory by Christopher Date to describe databases which decompose relational variables to irreducible elements. While this form may be unimportant for ...
... as well as the modeling of small parts of the data model, without the need for redesign. Sixth Normal Form (6NF) is a term used in relational database theory by Christopher Date to describe databases which decompose relational variables to irreducible elements. While this form may be unimportant for ...
Why developers should use ODBC instead of native proprietary
... to learn the intimate details of each database they work with. This means they can be more productive and you can avoid having specialized skills sets. When people tell us they don’t want to use ODBC, the performance myth is the usual reason stated, but it is not the only answer we get. It appears t ...
... to learn the intimate details of each database they work with. This means they can be more productive and you can avoid having specialized skills sets. When people tell us they don’t want to use ODBC, the performance myth is the usual reason stated, but it is not the only answer we get. It appears t ...
difference sequence compression of multidimensional databases
... the values in the attribute A = {0, 1, . . . , 899} are represented in 10 bits instead of being represented by 3 ASCII characters). In the case of adaptive text substitution (ATS), if a sequence of symbols has occurred previously, it is replaced by a pointer to that previous occurrence. In [5] they ...
... the values in the attribute A = {0, 1, . . . , 899} are represented in 10 bits instead of being represented by 3 ASCII characters). In the case of adaptive text substitution (ATS), if a sequence of symbols has occurred previously, it is replaced by a pointer to that previous occurrence. In [5] they ...
Database Architectures for New Hardware
... GUI interfaces built on top of API’s to provide higher-level analysis ...
... GUI interfaces built on top of API’s to provide higher-level analysis ...
How to Back Up and Restore the System Configuration
... time is thus a good idea; flushing it does not in itself make the transaction log file smaller, but it prevents it from growing out of control. XProtect Corporate does not, however, automatically flush the SQL Server’s transaction log at specific intervals. This is because users have different needs ...
... time is thus a good idea; flushing it does not in itself make the transaction log file smaller, but it prevents it from growing out of control. XProtect Corporate does not, however, automatically flush the SQL Server’s transaction log at specific intervals. This is because users have different needs ...
How to Scale a Database System - CMU-CS 15
... • NoSQL systems are able to scale horizontally right out of the box by giving traditional database features. ...
... • NoSQL systems are able to scale horizontally right out of the box by giving traditional database features. ...
Address databases for national SDI: Comparing the novel data
... ‘federation-by-accord’ data sharing model: data harvesting, federated databases and data grids. The large number of organizations involved in a national address database, as well as the lack of a single organization tasked with the management of a national address database, presents the data grid as ...
... ‘federation-by-accord’ data sharing model: data harvesting, federated databases and data grids. The large number of organizations involved in a national address database, as well as the lack of a single organization tasked with the management of a national address database, presents the data grid as ...
IV. Proposed hybrid algorithm for solving join ordering problem
... elational data model has been introduced by Codd [1] and in recent years, relational database systems have been recognized as a standard in scientific and commercial applications. Work on join operator, because of its high evaluation cost, is the primary purpose of relational query optimizers. If qu ...
... elational data model has been introduced by Codd [1] and in recent years, relational database systems have been recognized as a standard in scientific and commercial applications. Work on join operator, because of its high evaluation cost, is the primary purpose of relational query optimizers. If qu ...
Re-design of a Database Course Unit using the ACM
... topics are more difficult for students lacking the background. Software Engineering students subsequently take Web Programming, but they do lack some prior knowledge when taking the database course that other SCS students have obtained. The Quality Assurance report proposed adding a new course for e ...
... topics are more difficult for students lacking the background. Software Engineering students subsequently take Web Programming, but they do lack some prior knowledge when taking the database course that other SCS students have obtained. The Quality Assurance report proposed adding a new course for e ...
Making Your Network Safe for Databases
... being allowed into your DMZ. Are you confident that your mail server is so secure that it could not be compromised and used as a launch pad to attack your database server? Depending on the size of your company, you may not have control over all of the servers in your DMZ, so you may be relying on ba ...
... being allowed into your DMZ. Are you confident that your mail server is so secure that it could not be compromised and used as a launch pad to attack your database server? Depending on the size of your company, you may not have control over all of the servers in your DMZ, so you may be relying on ba ...
DBA Guide to Databases on VMware
... system is configured can become limiting factors, as can the database software configuration. The way the database is physically laid out on the disk drives and the types of indexing chosen also have an effect. The way queries against the database are coded can dramatically change how quickly result ...
... system is configured can become limiting factors, as can the database software configuration. The way the database is physically laid out on the disk drives and the types of indexing chosen also have an effect. The way queries against the database are coded can dramatically change how quickly result ...
SUGI 23: Optimizing SASr Software Access to an Oracle Database
... was taken. Since the extract, daily logs of all database changes have been accumulated in flat files consisting of around 500 megabytes per day. ...
... was taken. Since the extract, daily logs of all database changes have been accumulated in flat files consisting of around 500 megabytes per day. ...
Starting with Java Persistence Architecture
... In a traditional JDBC program, it is commonplace to use simple data classes that correspond to the rows of database tables. Instances of these classes have data members that hold data copied to and from corresponding columns in a relational table. Code utilizing such classes is simple, but relativel ...
... In a traditional JDBC program, it is commonplace to use simple data classes that correspond to the rows of database tables. Instances of these classes have data members that hold data copied to and from corresponding columns in a relational table. Code utilizing such classes is simple, but relativel ...
Internals, Troubleshooting, and Best Practices for use of Scaleout
... used either by SQL Server features, such as query notifications and event notifications, or by the Service Broker infrastructure. Because each Service Broker message must have a message type and each dialog conversation must adhere to a specific contract, applications usually define their own messag ...
... used either by SQL Server features, such as query notifications and event notifications, or by the Service Broker infrastructure. Because each Service Broker message must have a message type and each dialog conversation must adhere to a specific contract, applications usually define their own messag ...
XML - Cern
... DBMS_XMLGEN.setRowTag(qryCtx, ‘EMPLOYEE’); DBMS_XMLGEN.setMaxRows(qryCtx, 5); LOOP result := DBMS_XMLGEN.getXML(qryCtx); ...
... DBMS_XMLGEN.setRowTag(qryCtx, ‘EMPLOYEE’); DBMS_XMLGEN.setMaxRows(qryCtx, 5); LOOP result := DBMS_XMLGEN.getXML(qryCtx); ...
The Database Decision:
... with the mainframe and the personal computer and extending to modern virtual and software-defined architectures — the major gains in IT development have come from the labs of companies such as IBM, Apple, Microsoft, VMware, and more. The previously mentioned vendors’ platforms have helped companies ...
... with the mainframe and the personal computer and extending to modern virtual and software-defined architectures — the major gains in IT development have come from the labs of companies such as IBM, Apple, Microsoft, VMware, and more. The previously mentioned vendors’ platforms have helped companies ...
2-3 Information on the OSPAR RID database development activities
... the harmonization of the national RID data. An overview of the 2008 database is given in section 3. However, there is a need to improve the database structure due to some shortcomings of the 2008 RID database. These shortcomings result from the fact that this first database was conceived as the firs ...
... the harmonization of the national RID data. An overview of the 2008 database is given in section 3. However, there is a need to improve the database structure due to some shortcomings of the 2008 RID database. These shortcomings result from the fact that this first database was conceived as the firs ...
EFFICIENCY ISN’T ENOUGH: DATA CENTERS LEAD THE DRIVE TO INNOVATION
... “We are not given even the minimum amount of time needed for database and systems management, because we keep having new projects thrown at us and management does not understand the need to maintain the systems that they have us put in until they crash.” (Data on how many of the “leaders” in low-cos ...
... “We are not given even the minimum amount of time needed for database and systems management, because we keep having new projects thrown at us and management does not understand the need to maintain the systems that they have us put in until they crash.” (Data on how many of the “leaders” in low-cos ...
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.