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Computer Science
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The Relational Model and Normalization
A key:
must always be composed of two or more columns.
can only be one column.
identifies a row.
identifies a column.
Correct Answer:
identifies a row.
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The Relational Model and Normalization
An attribute is a(n):
If attributes A and B determine attribute C, then it is also true that:
The primary key is selected from the:
In the relational model, relationships between relations or tables are created by using:
Table is synonymous with the term:
For some relations, changing the data can have undesirable consequences called:
Which of the following is not a restriction for a table to be a relation?
A functional dependency is a relationship between or among:
When the values in one or more attributes being used as a foreign key must exist in another set of one or more attributes in another table, we have created a(n):
The functional dependency R → S means that the value of S can be determined when we are given a value of R.
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