2.1.5 Databases - GCSE Computing
... Querying: involves using software to search the database for information of interest to the user. E.g. a user of a car showroom database could run a sophisticated query to “find all hatchback or saloon Toyota cars registered between August 2006 and July 2010 but not with 5 doors”. Maintaining a log ...
... Querying: involves using software to search the database for information of interest to the user. E.g. a user of a car showroom database could run a sophisticated query to “find all hatchback or saloon Toyota cars registered between August 2006 and July 2010 but not with 5 doors”. Maintaining a log ...
ADO. NET - University of Bridgeport
... A Dataset is a disconnected object that can potentially contain all or part of the database including tables, constraints and their relationships. Thus for using databases in web applications, Dataset can provide a much higher performance for mostly readonly type of data. The DataSet class can furth ...
... A Dataset is a disconnected object that can potentially contain all or part of the database including tables, constraints and their relationships. Thus for using databases in web applications, Dataset can provide a much higher performance for mostly readonly type of data. The DataSet class can furth ...
Knowledge management systems
... maintained. A record generally describes an entity. An attribute is a particular characteristic or quality of a particular entity. The primary key is a field that uniquely identifies a record. Secondary keys are other field that have some identifying information but may not identify the file with co ...
... maintained. A record generally describes an entity. An attribute is a particular characteristic or quality of a particular entity. The primary key is a field that uniquely identifies a record. Secondary keys are other field that have some identifying information but may not identify the file with co ...
Intelligent Systems, Databases and Business Intelligence
... The main goal in designing the data warehouse is to support queries by making complex economic analysis that would use the entire amount possessed by collected data to provide information necessary for strategic decision making. There are two ways you can put value on the information from the data w ...
... The main goal in designing the data warehouse is to support queries by making complex economic analysis that would use the entire amount possessed by collected data to provide information necessary for strategic decision making. There are two ways you can put value on the information from the data w ...
cs440outline - Computer Science Home
... To learn the evolution of database systems and to appreciate the advantages of database over file systems in terms of efficiency and effectiveness. To understand the basic concepts of database systems including data abstraction and the three-level architecture; data independence; and data modeling. ...
... To learn the evolution of database systems and to appreciate the advantages of database over file systems in terms of efficiency and effectiveness. To understand the basic concepts of database systems including data abstraction and the three-level architecture; data independence; and data modeling. ...
Rule 3: Systematic Treatment of NULL values
... PL/SQL provides access to predefined SQL packages. PL/SQL provides support for Developing Web Applications and Server Pages. PL/SQL provides a built-in interpreted and OS independent programming environment. PL/SQL can also directly be called from the command-line SQL*Plus interface. Direc ...
... PL/SQL provides access to predefined SQL packages. PL/SQL provides support for Developing Web Applications and Server Pages. PL/SQL provides a built-in interpreted and OS independent programming environment. PL/SQL can also directly be called from the command-line SQL*Plus interface. Direc ...
Database Tables and Normalization
... • The highest level of normalization is not always desirable. ...
... • The highest level of normalization is not always desirable. ...
MIS-2012-supplement
... interactions with the system's environment, other systems, and other processes. Named with a strong action verb followed by object clause describing what the work is performed on/for 10. ...
... interactions with the system's environment, other systems, and other processes. Named with a strong action verb followed by object clause describing what the work is performed on/for 10. ...
notes - USERLab
... – It is difficult to decide what form information should be represented in when combining differing database schemes. • If this is not done carefully it is likely that the database will end up with misleading or inconsistent data. ...
... – It is difficult to decide what form information should be represented in when combining differing database schemes. • If this is not done carefully it is likely that the database will end up with misleading or inconsistent data. ...
Probabilistic Data Management
... Need to manage imprecisions in data • Many types: non-matching data values, imprecise queries, inconsistent data, misaligned schemas, etc. The quest to manage imprecisions = major driving force in the database community • Ultimate driver for many research areas: data mining, semistructured data, sch ...
... Need to manage imprecisions in data • Many types: non-matching data values, imprecise queries, inconsistent data, misaligned schemas, etc. The quest to manage imprecisions = major driving force in the database community • Ultimate driver for many research areas: data mining, semistructured data, sch ...
8. managing data resources - College of Business Administration
... different values of the same piece of information in two different systems. • Poor security: Because there is little control or management of data, management will have no knowledge of who is accessing or even making changes to the organization’s data. ...
... different values of the same piece of information in two different systems. • Poor security: Because there is little control or management of data, management will have no knowledge of who is accessing or even making changes to the organization’s data. ...
September 2010 - NVidia GPU Technology Conference
... A test case: genomic sequence data • Typical data-management scenario: – All data is maintained in file-system files – Processing software reads and writes files – “Database-like” operations (e.g. joins) are performed using command-line tools (e.g. Perl scripts) ...
... A test case: genomic sequence data • Typical data-management scenario: – All data is maintained in file-system files – Processing software reads and writes files – “Database-like” operations (e.g. joins) are performed using command-line tools (e.g. Perl scripts) ...
File Systems and Databases
... E-R models are normally represented in an entity relationship diagram (ERD). An entity is represented by a rectangle. Each entity is described by a set of attributes. An attribute describes a particular characteristics of the entity. A relationship is represented by a diamond connected to the relate ...
... E-R models are normally represented in an entity relationship diagram (ERD). An entity is represented by a rectangle. Each entity is described by a set of attributes. An attribute describes a particular characteristics of the entity. A relationship is represented by a diamond connected to the relate ...
DB2_Ch07
... • Often need additional indexes • Using CREATE INDEX command, SQL indexes can be created on basis of any selected attribute • Composite index – Index based on two or more attributes – Often used to prevent data duplication ...
... • Often need additional indexes • Using CREATE INDEX command, SQL indexes can be created on basis of any selected attribute • Composite index – Index based on two or more attributes – Often used to prevent data duplication ...
Lab 13-final
... The SQL LIKE Operator The LIKE operator is used to search for a specified pattern in a column. ...
... The SQL LIKE Operator The LIKE operator is used to search for a specified pattern in a column. ...
Diapositive 1
... easily select the data source, table and fields they would like to use. In this mode, it is also possible to sort the results. ...
... easily select the data source, table and fields they would like to use. In this mode, it is also possible to sort the results. ...
Towards Unifying Database Systems and Information
... Find relevant elements in important workshops between the years 1999 and 2001 that are about ‘Ricardo’ and ‘XML’ ...
... Find relevant elements in important workshops between the years 1999 and 2001 that are about ‘Ricardo’ and ‘XML’ ...
Fed
... Datafiles and Galleries • Each datafile has an owner • belongs to a Grog • is referenced in one or more Galleries • A gallery has a parent Gallery • links to datafiles • can contain sub-galleries • created by the users ...
... Datafiles and Galleries • Each datafile has an owner • belongs to a Grog • is referenced in one or more Galleries • A gallery has a parent Gallery • links to datafiles • can contain sub-galleries • created by the users ...
University at Buffalo Combining Keyword Search and Forms for Ad Hoc
... along with the values entered in the form, is executed and the results are provided to the user. The paper considers a DBLife dataset containing 5 entity tables and 9 relationship tables. It also described three algorithms which are used to search the keywords entered within the query forms. Since t ...
... along with the values entered in the form, is executed and the results are provided to the user. The paper considers a DBLife dataset containing 5 entity tables and 9 relationship tables. It also described three algorithms which are used to search the keywords entered within the query forms. Since t ...
TRUNCATE TABLE
... – IDENTITY columns will receive the next identity value – Columns with a timestamp data type will receive the next appropriate values – All other columns will receive a NULL ...
... – IDENTITY columns will receive the next identity value – Columns with a timestamp data type will receive the next appropriate values – All other columns will receive a NULL ...
Extending Database Management Systems by Developing New
... How far to extend languages like SQL? Current extensions support objects, procedural functionality ...
... How far to extend languages like SQL? Current extensions support objects, procedural functionality ...
Model-Driven NoSQL Data Engineering
... metamodels as UML class diagrams. Note that entity versions cannot be explicitly represented in class diagrams, but a new kind of representation is needed. Object validators (a.k.a. schema predicates) could be created to assure that all the objects a given application retrieves or stores conform to ...
... metamodels as UML class diagrams. Note that entity versions cannot be explicitly represented in class diagrams, but a new kind of representation is needed. Object validators (a.k.a. schema predicates) could be created to assure that all the objects a given application retrieves or stores conform to ...
Chapter 1
... Responsible for authorizing access to the database, for coordinating and monitoring its use, acquiring software and hardware resources, controlling its use and monitoring efficiency of operations. ...
... Responsible for authorizing access to the database, for coordinating and monitoring its use, acquiring software and hardware resources, controlling its use and monitoring efficiency of operations. ...
Normalization
... and every non-key attribute is non-transitively dependent on the primary key attribute • En entity is said to be in 3NF if has been placed in 2NF and if all fields which are not part of the primary key are mutually independent , that is there are no transitive dependencies (where a field is dependen ...
... and every non-key attribute is non-transitively dependent on the primary key attribute • En entity is said to be in 3NF if has been placed in 2NF and if all fields which are not part of the primary key are mutually independent , that is there are no transitive dependencies (where a field is dependen ...
PPT - Cover Pages
... • High performance database(Oracle,DB2...) uses very complicated storage format, e.g. it is storage media related • Is it possible that every application can read/write this format itself? – Few companies are able to parse such complicated format – It is certain that the data will be destroyed by bu ...
... • High performance database(Oracle,DB2...) uses very complicated storage format, e.g. it is storage media related • Is it possible that every application can read/write this format itself? – Few companies are able to parse such complicated format – It is certain that the data will be destroyed by bu ...
Database model
A database model is a type of data model that determines the logical structure of a database and fundamentally determines in which manner data can be stored, organized, and manipulated. The most popular example of a database model is the relational model, which uses a table-based format.