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12 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Data |
Raw Facts Building blocks of information Has not yet beenprocessed to reveal the meaning |
Differs from information |
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Information |
Produced by processig data Reveals the meaning of data Enables Knowledge reation Should be accurate, relevant andtimely to enable good decsion making |
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Metadata |
Data about data which describes data characteristics and relationships |
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What is a Database? |
Shared, integrated computer structure that stores a collection of end user data and metadata |
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What is a Database Management System (DBMS) and what does it do? |
Collection of programs that manages database structure and controls access. Acts as an intermediary between the data and the users. |
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What is data inconsistency? |
Different versions of the same data that appear in the same place |
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What is the difference between structural dependence and structural independence? |
Structural dependence means that access to a file is dependent on its own structure. Structural independence means that if a file structure is changed, it does not affect the application's ability to access it |
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Describe Data Redundancy |
Unnecessarily storing same data at different places |
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What is a data anomaly? |
Data anomalies are data inconsistencies that result when not all required changes are made to redundant data |
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What are the most common data models? |
Hierarchical, Network, Relational |
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What is SQL |
Structured Query Language De facto query language and data access standard supported by the majority of DBMS vendors. |
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What is Big Data? |
Large amounts of unstructured data that does not conform well to traditional relational database modeling |
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