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Author Question: In a database, columns are also called ________. A) records B) tables C) files D) ... (Read 214 times)

tingc95

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on: Jul 7, 2018
In a database, columns are also called ________.
 
  A) records
  B) tables
  C) files
  D) fields

Question 2

Distinguish between the physical description and the semantic description of an attribute domain.
 
  What will be an ideal response?


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eliasc0401

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Reply #1 on: Jul 7, 2018
Answer to Question 1

D

Answer to Question 2

The physical description of an attribute defines the data type, data length, and other data value constraints, and thus indicates specifications for the storage and processing of the attribute. The semantic description of the attribute indicates the logical meaning of the attribute in the users' environment, and thus the semantic description differentiates between attributes having the same physical description.


tingc95

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Reply 2 on: Jul 7, 2018
Gracias!

raili21

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Reply 3 on: Yesterday
Wow, this really help

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