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Management Information Systems Chapter 6

field
a grouping of characters into a word, a group of words, or a complete number
record
a group of related fields
file
a group of records of the same type
entity
a person, place, thing, or event on which we store and maintain information.
data redundancy
the presence of duplicate data in multiple data files so that the same data are stored in more than one place or location
database
a collection of data organized to service many applications at the same time by storing and managing data so that they appear to be in one location
database management system (DBMS)
software that permits an organization to centralize data, manage them efficiently and provide access to the stored data by application programs
relational DBMS
a type of logical database model that treats data as if they were stored in two-dimensional tables. It can relate data stored in one table to data in another as long as the two tables share a common data element
tuples
technical term for rows
key field
A field in a record that uniquely identifies instances of that record so that it can be retrieved, updated, or sorted
primary key
unique identifier for all the information in any row of a database table
foreign key
Field in a database table that enables users to find related information in another database table
object-oriented DBMS
an approach to data management that stores both data and the procedures acting on the data as objects that can be automatically retrieved and shared; the objects can contain multimedia.
object-relational DBMS
A database management system that combines the capabilities of a relational DBMS for storing traditional information and the capabilities of an object-oriented DBMS for storing graphics and multimedia.
data definition
DBMS capability that specifies the structure and content of the database
data manipulation language
A language associated with a database management system that end users and programmers use to manipulate data in the database
structured query language (SQL)
The standard data manipulation language for relational database management systems.
normalization
the process of creating small stable data structures form complex groups of data when designing a relational database
database server
A computer in a client/server environment that is responsible for running a DBMS to process SQL statements and perform database management tasks
information policy
Formal rules governing the maintenance, distribution, and use of information in an organization

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