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Data integrity constraints are used to:

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Data integrity constraints are used to:

(a) Control who is allowed access to the data

(b) Ensure that duplicate records are not entered into the table

(c) Improve the quality of data entered for a specific property

(d) Prevent users from changing the values stored in the table

I had been asked this question in homework.

This intriguing question originated from Constraints topic in chapter Database Systems Design and Implementation of Database Management

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Best answer
The correct choice is (c) Improve the quality of data entered for a specific property

Best explanation: The data entered will be in a particular cell (i.e., table column).

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