Creating the Data Layer
... The field AddressNo is going to be the primary key for this table and will be used to uniquely identify each record in the table. The first step is to make sure this value is unique. To do this we set it as the identity of the table so that the database will generate this value. Click once in the n ...
... The field AddressNo is going to be the primary key for this table and will be used to uniquely identify each record in the table. The first step is to make sure this value is unique. To do this we set it as the identity of the table so that the database will generate this value. Click once in the n ...
Selling an Idea or a Product
... – Exams will be based on your understanding of the concepts and home works; if you don’t do the home works you are likely to do poorly in your exams. – Home works will be checked for cheating. Any two home works found to be the same will be given zero and serious action can be taken. – Home works ar ...
... – Exams will be based on your understanding of the concepts and home works; if you don’t do the home works you are likely to do poorly in your exams. – Home works will be checked for cheating. Any two home works found to be the same will be given zero and serious action can be taken. – Home works ar ...
sql101-webdev-nov-2012
... What is a database and why? • A database can be as simple as a single, excellike table • For your website, a database brings you the power of dynamic data • Different technologies are used (e.g., MySQL, SQL Server, Access, Oracle, Sybase, DB2, ...
... What is a database and why? • A database can be as simple as a single, excellike table • For your website, a database brings you the power of dynamic data • Different technologies are used (e.g., MySQL, SQL Server, Access, Oracle, Sybase, DB2, ...
Building Mission Critical Applications
... .NET class can be called such as preserved across saves invoking pipelines components) Array support for Web Services Allow variable number of message (consuming only, no publishing) parts. Jagged array support Unique event log id’s for better MOM support. (no multidimensional arrays) Access the ...
... .NET class can be called such as preserved across saves invoking pipelines components) Array support for Web Services Allow variable number of message (consuming only, no publishing) parts. Jagged array support Unique event log id’s for better MOM support. (no multidimensional arrays) Access the ...
File Systems and Databases Assessment
... 1. Explain the following statement: a transaction is a logical unit of work. A transaction is generated by events and it is a logical unit of work. That means, to record a transaction, all related events should be completed and no partial states are acceptable to avoid data inconsistency. For exampl ...
... 1. Explain the following statement: a transaction is a logical unit of work. A transaction is generated by events and it is a logical unit of work. That means, to record a transaction, all related events should be completed and no partial states are acceptable to avoid data inconsistency. For exampl ...
Normalizing SAS Datasets Using User Defined Formats
... Creating the user defined formats is equivalent to creating the child tables associated with a normalized set of data. These formats are utilized with a SAS PUT function. The PUT function uses the user defined format and a starting value to retrieve the stored data. The PUT function does both the Lo ...
... Creating the user defined formats is equivalent to creating the child tables associated with a normalized set of data. These formats are utilized with a SAS PUT function. The PUT function uses the user defined format and a starting value to retrieve the stored data. The PUT function does both the Lo ...
Physical Database Design
... Relational Database Theory • Comments on Indexing – An index can be built on any column or combination of columns – An index can be unique or non-unique – An index on the primary key is called the primary index – Most RDBMSs use an internal row id as the pointer to the row – Use of the index is tra ...
... Relational Database Theory • Comments on Indexing – An index can be built on any column or combination of columns – An index can be unique or non-unique – An index on the primary key is called the primary index – Most RDBMSs use an internal row id as the pointer to the row – Use of the index is tra ...
week15 - Arms-A
... the ODBMS libraries and with the code that implements its class methods. Much of the code that manipulates objects is part of the database itself. Each class has a set of methods. Method signatures are specified in the schema using ODL. The code for these methods is stored on the database server. OD ...
... the ODBMS libraries and with the code that implements its class methods. Much of the code that manipulates objects is part of the database itself. Each class has a set of methods. Method signatures are specified in the schema using ODL. The code for these methods is stored on the database server. OD ...
Database Environments
... to have more than one parent, thus creating a networked-like table structure. Multiple parent tables for each child allows for manyto-many relationships, in addition to one-tomanyrelationships ...
... to have more than one parent, thus creating a networked-like table structure. Multiple parent tables for each child allows for manyto-many relationships, in addition to one-tomanyrelationships ...
DAT336 Connected vs Disconnected Data Access in
... “Disconnected” apps are online applications that don’t keep database connections open for long periods of time such as the lifetime of a session Usually 3-tier applications ...
... “Disconnected” apps are online applications that don’t keep database connections open for long periods of time such as the lifetime of a session Usually 3-tier applications ...
INTRODUCTION TO INFORMATION SYSTEMS TECHNOLOGY
... Design a database. Build the database tables using Microsoft Access . Establish relationships between tables. Design and use forms. Perform basic database queries. Use Microsoft Word to perform a mail merge with the database. ...
... Design a database. Build the database tables using Microsoft Access . Establish relationships between tables. Design and use forms. Perform basic database queries. Use Microsoft Word to perform a mail merge with the database. ...
data model - Computer Science
... Database Structure database structure is the description and definition of all basic structures such as simple conceptual files, datatypes, relationships, and constraints that should hold on the data. ...
... Database Structure database structure is the description and definition of all basic structures such as simple conceptual files, datatypes, relationships, and constraints that should hold on the data. ...
OGSA-DAI - National e
... – If newer ones found they are downloaded, parsed and loaded into the DB » Goes some way to keeping the BRIDGES DB up to date with current data ...
... – If newer ones found they are downloaded, parsed and loaded into the DB » Goes some way to keeping the BRIDGES DB up to date with current data ...
Publisher
... ◦ Each tuple of the supertable (e.g. people) can correspond to at most one tuple in each of the subtables (e.g. students and teachers) ◦ Additional constraint in SQL:1999: All tuples corresponding to each other (that is, with the same values for inherited attributes) must be derived from one tuple ( ...
... ◦ Each tuple of the supertable (e.g. people) can correspond to at most one tuple in each of the subtables (e.g. students and teachers) ◦ Additional constraint in SQL:1999: All tuples corresponding to each other (that is, with the same values for inherited attributes) must be derived from one tuple ( ...
UNIT
... o It is desirable to restrict the schedules to those that are cascadeless o Cascadeless schedules - Cascading rollbacks cannot occur; for each pair of transactions Ti and Tj such that Tj reads a data item previously written by Ti , the commit operation of Ti appears before the read operation of Tj. ...
... o It is desirable to restrict the schedules to those that are cascadeless o Cascadeless schedules - Cascading rollbacks cannot occur; for each pair of transactions Ti and Tj such that Tj reads a data item previously written by Ti , the commit operation of Ti appears before the read operation of Tj. ...
Facilitating Documen..
... A large number of organizations today generate and share textual descriptions of their products, services, and actions .Such collections of textual data contain significant amount of structured information, which remains buried in the unstructured text. While information extraction algorithms facili ...
... A large number of organizations today generate and share textual descriptions of their products, services, and actions .Such collections of textual data contain significant amount of structured information, which remains buried in the unstructured text. While information extraction algorithms facili ...
8. MANAGING DATA RESOURCES
... Building a database requires two types of designs Logical design Abstract model of how data should be structured and arranged to meet an organization’s information needs ...
... Building a database requires two types of designs Logical design Abstract model of how data should be structured and arranged to meet an organization’s information needs ...
Normalisation
... cannot be broken down into any smaller components all primary keys must remain unique every foreign key must have a matching primary key in its related table. ...
... cannot be broken down into any smaller components all primary keys must remain unique every foreign key must have a matching primary key in its related table. ...
7. Decision Trees and Decision Rules
... Green(1980). The data were obtained from a randomized clinical trial comparing 4 treatments for 506 patients with prostatic cancer. There are 12 pre-trial covariates measured on each patient, 7 variables may be taken to be continuous, 4 to be discrete and 1 variable (SG) is an index. We treat SG as ...
... Green(1980). The data were obtained from a randomized clinical trial comparing 4 treatments for 506 patients with prostatic cancer. There are 12 pre-trial covariates measured on each patient, 7 variables may be taken to be continuous, 4 to be discrete and 1 variable (SG) is an index. We treat SG as ...
Information systems and databases
... o Collected data from each webpage (an index) is used by search engines to do relevancy calculations about the keywords so only the most relevant information is retrieved. o To expand the index, search robots are used to trawl the web and collect more sites. o Searches can be refined using + symbols ...
... o Collected data from each webpage (an index) is used by search engines to do relevancy calculations about the keywords so only the most relevant information is retrieved. o To expand the index, search robots are used to trawl the web and collect more sites. o Searches can be refined using + symbols ...
PowerBroker for Databases
... have manual processes in which case costs, in the form of man-hours consumed gathering evidence to support a claim of adequate database control, are extreme. Others may consider developing their own primitive auditing tools using native database auditing features. The cost of development and mainten ...
... have manual processes in which case costs, in the form of man-hours consumed gathering evidence to support a claim of adequate database control, are extreme. Others may consider developing their own primitive auditing tools using native database auditing features. The cost of development and mainten ...
distributed database
... • Centralized : A single site is in charge of handling lock and unlock requests for all objects. • Primary Copy: One copy of each object is designated the primary copy. All requests to lock or unlock a copy of this object are handled by the lock manager at the site where the primary copy is stored, ...
... • Centralized : A single site is in charge of handling lock and unlock requests for all objects. • Primary Copy: One copy of each object is designated the primary copy. All requests to lock or unlock a copy of this object are handled by the lock manager at the site where the primary copy is stored, ...
Lecture 3
... not well-suited for computer implementation (does not even have operations on its structures) ...
... not well-suited for computer implementation (does not even have operations on its structures) ...