Discussion
Which of the following data constraints would be used to specify that the value of cells in a column must be one of a specific set of possible values?
Answer: A
Correct answer: A domain constraint
A domain constraint restricts a column to a specified set of permitted values, so that only those values may be stored. A range constraint bounds the value between limits rather than enumerating it, an intrarelation constraint compares columns within one table, and an interrelation constraint compares across tables.
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