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Applications developer
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A person who designs and develops applications that extend the functionality of a database system.
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Bit
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A single unit of information that is either true or false, on or off, 1 or 0.
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Byte
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A sequence of 8 bits. A single text character is stored in one byte.
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Client-server system
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A system made up of two or more components, in which the client makes requests and the server listens and responds. The client-server interaction typically takes place across a communications network, such as the Internet.
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Data
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A collection of bits that represent some value or collection of values.
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Data model
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A description of what kind of information will go into a particular database and how that information will be structured or organized
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Database, or database system
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A combination of software, data, and computer hardware that implements a specific data model. A database system uses a DBMS and is combined with application programs to create an information system that has a specific purpose.
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Database administrator
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A person who controls access to the database system, maintains data accuracy and integrity, and monitors and improves database performance.
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Database designer
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A software professional who specifies information content and creates database systems.
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Database management system (DBMS)
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A combination of software and data storage that provides the means to create and maintain database systems.
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End user
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A person whose job requires access to the information content of a database system.
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Information
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Data that have a specific interpretation or meaning.
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Information system
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A collection of software applications and computer hardware that store and manipulate information.
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Instance
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An object, or collection of values, in a database system.
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Internet
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The worldwide network of computers that includes strategies for naming and locating specific computers and transferring information among them.
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Query
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A request for some of a database’s information content.
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Relational database management system (RDBMS)
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A DBMS that implements the relational data model. RDBMSs typically use SQL as their interaction language.
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Schema.
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See Data Model.
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SQL (Structure Query Language)
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A standard language for defining the structure of relational databases and manipulating their contents.
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Web
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See World Wide Web.
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