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29 Cards in this Set
- Front
- Back
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group of programs to manage database
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1. Database management system (DBMS):
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Bits, characters, fields, records, files, and databases
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2. Hierarchy of Data
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represents a circuit that is either on or off
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a. Bit
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typically made up of eight bits
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b. Byte
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generalized class of people, places, or things (objects) for which data is collected, stored, and maintained
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3. Entity
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characteristic of an entity
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4. Attribute
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specific value of an attribute
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5. Data item
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field or set of fields in a record that is used to identify the record
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6. Key
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field or set of fields that uniquely identifies the record
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7. Primary key
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a pool of related data is shared by multiple application programs
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8. Database approach to data management
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diagram of data entities and their relationships
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9. Data model
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data models that use basic graphical symbols to show the organization of and relationships between data
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10. Entity-relationship (ER) diagrams
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describes data in which all data elements are placed in two-dimensional tables, called relations, that are the logical equivalent of files
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11. Relational model
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• Selecting: eliminates rows according to certain criteria
• Projecting: eliminates columns in a table • Joining: combines two or more tables • Linking: manipulating two or more tables that share at least one common data attribute to provide useful information and reports |
12. Relational database model
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process of looking for and fixing inconsistencies to ensure that data is accurate and complete
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13. Data cleanup
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Simple database program whose records have no relationship to one another
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14. Flat File
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description of the entire database
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15. Schema
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collection of instructions and commands used to define and describe data and relationships in a specific database
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16. Data definition language (DDL
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detailed description of all the data used in the database
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17. Data dictionary
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commands that manipulate the data in a database
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18. Data manipulation language (DML
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Adopted by the American National Standards Institute (ANSI) as the standard query language for relational databases
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19. Structured Query Language (SQL)
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database that collects business information from many sources in the enterprise, covering all aspects of the company’s processes, products, and customers
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20. Data warehouse
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subset of a data warehouse
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21. Data mart
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information-analysis tool that involves the automated discovery of patterns and relationships in a data warehouse
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22. Data mining
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process of gathering enough of the right information in a timely manner and usable form and analyzing it to have a positive impact on business strategy, tactics, or operations
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23. Business intelligence (BI):
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aspect of business intelligence limited to information about competitors and the ways that knowledge affects strategy, tactics, and operations
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24. Competitive intelligence
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Database in which the data may be spread across several smaller databases connected via telecommunications devices
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25. Distributed database
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Database that holds a duplicate set of frequently used data
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26. Replicated database
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Software that allows users to explore data from a number of different perspectives
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27. Online Analytical Processing (OLAP)
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