Discussion :: DBMS MCQs
- Which of the following can be addressed by enforcing a referential integrity constraint?
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A.
All phone numbers must include the area code
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B.
Certain fields are required (such as the email address, or phone number) before the record is accepted
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C.
Information on the customer must be known before anything can be sold to that customer
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D.
Then entering an order quantity, the user must input a number and not some text (i.e., 12 rather than 'a dozen')
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Answer : Option C
Explanation :
Information on the customer must be known before anything can be sold to that customer
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