Question

on what based the data entry in base is controlled and restricted that we have defined for each field
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Answer 1

Answer:

A validation rule is one way to restrict input in a table field or a control (such as a text box) on a form. ... Data types Every table field has a data type that restricts what users can enter. For example, a Date/Time field accepts only dates and times, a Currency field accepts only monetary data, and so on.

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Explanation:

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