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Author Question: Describe the requirements that a table must meet to qualify as a relation. What will be an ideal ... (Read 89 times)

littleanan

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on: Jul 7, 2018
Describe the requirements that a table must meet to qualify as a relation.
 
  What will be an ideal response?

Question 2

A hash mark across the relationship line near an entity indicates ________.
 
  A) a maximum cardinality of zero
  B) a maximum cardinality of one
  C) a minimum cardinality of optional
  D) a minimum cardinality of required


ergserg

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

In order for a table to meet the requirements of a relation, it must satisfy certain conditions. First, the rows contain data about an entity or some portion of the entity. Second, the columns contain data that represent attributes of the entity. Third, each column must contain the same kind of data for all rows. Fifth, each column must have a unique name. Sixth, the cells must contain single valuesno group or array values are allowed. Seventh, the order of the columns and the rows is insignificant. Finally, the rows must be unique.

Answer to Question 2

D


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