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25 Cards in this Set
- Front
- Back
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database management system
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allows users to create a computerized database; add, modify, and delete data; sort and retrieve data; create forms and reports from the data
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Garbage In, Garbage Out
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GIGO, points out the accuracy of a computer's output depends on the accuracy of the input
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character
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is one byte
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field
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a combination of one or more related characters
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record
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a group of related fields
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primary key
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uniquely identifies each record
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table
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a collection of related records
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file maintenance
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the procedures that keep data current
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validation
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compares data with a set of rules or values to find out if the data is correct
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data dictionary
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contains data about each file in the database and each field
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query
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restricted view of the data
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query language
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consists of simple, English-like statements that allow users to specify the data to display, print, or store
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Query by example (QBE)
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provides a GUI to assist users with retrieving data
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form
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a window on the screen that provides area for entering or modifying data in a database
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report generator
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allows users to design a report on the screen, retrieve data into the report design, and then display or print the report
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principle of least privilege
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means that access is granted only to items that one needs
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data model
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consists of rules and standards that define how the database organizes data
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relational database
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stores data in tables that consist of rows and columns
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relationship
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a link within the data
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Structured Query Language (SQL)
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a query language that allows users to manage, update, and retrieve data
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object-oriented database (OODB)
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stores data in objects, it allows more field types
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multidimensional database
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can store data in more than two dimensions of data
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data warehouse
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a huge database that stores and manages the data required to analyze historical and current transactions
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database analyst (DA)
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decides on proper field placement, defines data relationships, and identifies users' access privileges
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database administrator (DBA)
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creates and maintains the data dictionary, manages security, monitors performance, and checks backup and recovery procedures
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