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Clickstream Data
are data that visitors and consumers produce when they visit a website and click on hyperlinks
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Data rot
it refers primarily to problems with the media to which the data are stored
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Data Life Cycle
- Data Sources (Internal, External, and Personal Data)
- Data Analysis
- Result
- Solutions
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Database management System (DBMS)
is a set of programs that provides users with tools to add, delete, access, and analyze data stored in one location
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Data Redundancy
The same data are stored in many places
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Data isolation
Applications cannot access data associated with other application.
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Data Inconsistency
Various copies of the data do not agree.
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Bit
represents the smallest unit of data a computer can process
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Field
a logical group of characters into a word, small group of words, of an indentification #.
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Record
A logical grouping of related fields compose a record.
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file or table
A logical grouping of related records
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Database
A logical grouping of related tables
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Data model
Is a diagram that represents entities in the database and their relationship
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Entity
is a person, place, thing or event
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Attribute
Each characteristics or quality of a particular entity
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Secondary keys
student's majors
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Entity-relationship (ER) modelling
Plan and develop the database through this process using an entity-relationship (ER) diagram.
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Relational Database Model
is based on the concept of 2 dimensional tables
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Query Language
most popular query language used to request information
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Query by example
Another way to find info in a data base
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Data Dictionary
It defines the format necessary to enter the data into the database.
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normalization
Is a method for analyzing and reducing a relational database to its most streamlined form for minimum redundancy, maximum data integrity and best processing performance.
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Data Warehouse
is a repository of historical data organized by subject to support decision makers in the organization
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Online analytical processing
is the process of performing complex, multi-dimensional analyses of data stored in a database or warehouse
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online transaction processing
where business transactions are processed online as soon as they occur
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multi dimensional structure
more than 2 dimensions
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Data Mart
is a small data warehouse that is designed for the end user's needs in a strategic business unit or department.
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Data Governance
is an approach to managing information across an entire organization
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Master Data
are a set of core data, such as customers, products, employees, and so on.
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Master Data management
is a process that spans all organizational business processes and applications.
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Knowledge management systems
it refers to the use of modern info technologies to systematize, enhance, and expedite intrafirm and interfirm knowledge management.
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Knowledge or Intellectual capital
is information that is contextual, relevant, and actionable.
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Explicit knowledge
deals with more objective, rational, and technical knowledge
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Tacit knowledge
cumulative store of subjective or experiential learning.
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Best Practices
most effective and efficient ways of doing things.
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