Introduction to Databases - Department of Software and Information
... sender can be sure receiver is genuine (nonfabrication); sender cannot deny he or she sent it (nonrepudiation). ...
... sender can be sure receiver is genuine (nonfabrication); sender cannot deny he or she sent it (nonrepudiation). ...
The Relational Data Model and Relational Database Constraints
... professionals believe that it is best to use keys that are uniquely generated by the database, for example each row may have a primary key that is generated in the sequence of creation of rows (tuples). There are many advantages and disadvantages that are often been argued in design sessions. The ma ...
... professionals believe that it is best to use keys that are uniquely generated by the database, for example each row may have a primary key that is generated in the sequence of creation of rows (tuples). There are many advantages and disadvantages that are often been argued in design sessions. The ma ...
Download attachment
... International languages are handled easily within an enterprise-wide system; enabling users to dynamically change languages and see them applied in real-time. ...
... International languages are handled easily within an enterprise-wide system; enabling users to dynamically change languages and see them applied in real-time. ...
Introduction to Module
... “Data is only potential information; information is potential knowledge; and knowledge is potential competitive advantage if it is used in a creative, flexible, and above all, accurate way.” Adrian M (1990) Let’s Get Serious. Focus News. Winter. Ian Perry ...
... “Data is only potential information; information is potential knowledge; and knowledge is potential competitive advantage if it is used in a creative, flexible, and above all, accurate way.” Adrian M (1990) Let’s Get Serious. Focus News. Winter. Ian Perry ...
PowerView and PowerPivot 2012
... relationships, user hierarchies, or internal engine structures (except table dictionaries) are recalculated. Optimizes the table dictionary (an internal engine structure) for a given table or for all tables in the database. This operation removes all dictionary entries that no longer exist in the da ...
... relationships, user hierarchies, or internal engine structures (except table dictionaries) are recalculated. Optimizes the table dictionary (an internal engine structure) for a given table or for all tables in the database. This operation removes all dictionary entries that no longer exist in the da ...
Technical Overview
... Automated Time Series Processing Each database’s web service allows the data consumer to request data with a desired interval (annual, monthly, daily, hourly, raw) and statistic (min, max, average, sum, count, raw) Web service converts the time series to the desired interval and statistic prior to p ...
... Automated Time Series Processing Each database’s web service allows the data consumer to request data with a desired interval (annual, monthly, daily, hourly, raw) and statistic (min, max, average, sum, count, raw) Web service converts the time series to the desired interval and statistic prior to p ...
Software Applications - University of Saskatchewan
... Query: finds records that match a specific criteria Sort: ...
... Query: finds records that match a specific criteria Sort: ...
Chapter 8 - Spatial Database Group
... Provides improved performance on sequential and range searches. In a B+tree, all keys are redundantly stored in the leaf nodes. To ensure that physical records are not replaced, the B+tree variation is usually implemented. ...
... Provides improved performance on sequential and range searches. In a B+tree, all keys are redundantly stored in the leaf nodes. To ensure that physical records are not replaced, the B+tree variation is usually implemented. ...
Metacomputing Directory Service
... X.500, LDAP (Lightweight Directory Access Protocol) Chose to integrate existing systems as much as possible But use LDAP to organize ...
... X.500, LDAP (Lightweight Directory Access Protocol) Chose to integrate existing systems as much as possible But use LDAP to organize ...
DBCC CHECKDB In`s and Out`s
... • We are Data Professionals • Part of a DBA’s Job • Ensure Data Consistency ...
... • We are Data Professionals • Part of a DBA’s Job • Ensure Data Consistency ...
High-Quality Code - Unit Testing
... first” or “model first” entity classes are separate .cs files that are generated by T4 tempalte XXXModel.tt And each time we update the EntitiesModel from the database all files are generated anew If we add methods like ToString(), they will be overridden and lost That is why all the entity cl ...
... first” or “model first” entity classes are separate .cs files that are generated by T4 tempalte XXXModel.tt And each time we update the EntitiesModel from the database all files are generated anew If we add methods like ToString(), they will be overridden and lost That is why all the entity cl ...
Maintenance
... inserted or deleted • You can select how much free space for new data will be left when defragmenting is done • If database is primarily for data entry (OLTP) then it is best to leave significant free space at the end of each page so that related data stays together • If database is composed of data ...
... inserted or deleted • You can select how much free space for new data will be left when defragmenting is done • If database is primarily for data entry (OLTP) then it is best to leave significant free space at the end of each page so that related data stays together • If database is composed of data ...
Sample pages 2 PDF
... UNIVAC and IBM competed to develop the first database where records were linked in a way that was not sequential. UNIVAC had decided to adopt the COBOL (Common Business Oriented Language) programming language and therefore also adopted the CODASYL (COnference on DAta SYstems Languages) conventions f ...
... UNIVAC and IBM competed to develop the first database where records were linked in a way that was not sequential. UNIVAC had decided to adopt the COBOL (Common Business Oriented Language) programming language and therefore also adopted the CODASYL (COnference on DAta SYstems Languages) conventions f ...
Slide 1
... – Object-based data models use entities, attributes, and relationships to present information – The entity-relationship data model is an example of object-based model and describes data in the form of an E-R diagram – Record-based data models use records to present data – Relational data model is ba ...
... – Object-based data models use entities, attributes, and relationships to present information – The entity-relationship data model is an example of object-based model and describes data in the form of an E-R diagram – Record-based data models use records to present data – Relational data model is ba ...
Intro to Data Modeling
... noun by the use of describing, identifying, or quantifying words) – To find attributes, simply look for descriptive nouns that won’t be used as entities and/or adjectives in your business analysis – Each entity will generally have several to many attributes – and each attribute may have a little to ...
... noun by the use of describing, identifying, or quantifying words) – To find attributes, simply look for descriptive nouns that won’t be used as entities and/or adjectives in your business analysis – Each entity will generally have several to many attributes – and each attribute may have a little to ...
Training Exercises
... Search. Research. Discover. The exercises outlined in this document can be applied to any full text database or Collection within Informit. Warm up Exercise: Quick Search 1. Go to : http://search.informit.com.au 2. Scroll to find the database APAFT - Australian Public Affairs – Full Text 3. Click on ...
... Search. Research. Discover. The exercises outlined in this document can be applied to any full text database or Collection within Informit. Warm up Exercise: Quick Search 1. Go to : http://search.informit.com.au 2. Scroll to find the database APAFT - Australian Public Affairs – Full Text 3. Click on ...
PowerPoint
... • Ensuring that relationship between a pair of tables is sound and the records in the tables are synchronized when data is entered into, updated in or deleted from either table (MS-Access: only partially ...
... • Ensuring that relationship between a pair of tables is sound and the records in the tables are synchronized when data is entered into, updated in or deleted from either table (MS-Access: only partially ...
create table
... REFERENCES clause prevents making such a change in the foreign key value, but not in the primary key value. This problem could be handled by asserting that primary key values cannot be changed once they are established. In this case, updates to the customer table will be handled in most systems by i ...
... REFERENCES clause prevents making such a change in the foreign key value, but not in the primary key value. This problem could be handled by asserting that primary key values cannot be changed once they are established. In this case, updates to the customer table will be handled in most systems by i ...
Information Organization and Retrieval
... • Many physical database design decisions are implicit in the technology adopted – Also, organizations may have standards or an “information architecture” that specifies operating systems, DBMS, and data access languages -- thus constraining the range of possible physical implementations. ...
... • Many physical database design decisions are implicit in the technology adopted – Also, organizations may have standards or an “information architecture” that specifies operating systems, DBMS, and data access languages -- thus constraining the range of possible physical implementations. ...
Optimizations
... Integrity checks: what you need to do • Create a job to check integrity on a regular basis • Create alerts to monitor for errors: – 823: Page not read ...
... Integrity checks: what you need to do • Create a job to check integrity on a regular basis • Create alerts to monitor for errors: – 823: Page not read ...
Database Systems: Design, Implementation, and Management
... Hachim Haddouti, CH3, see also Rob & Coronel ...
... Hachim Haddouti, CH3, see also Rob & Coronel ...
Virtual Database Performance Tuning
... Unions of different connections in mappings block pushdown. Unions to the same connection will push down. Unions used in virtual database SQL queries that are submitted from the client do not generally block pushdown. ...
... Unions of different connections in mappings block pushdown. Unions to the same connection will push down. Unions used in virtual database SQL queries that are submitted from the client do not generally block pushdown. ...
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.