Computer Science for IGCSE & O level - Databases (Section 5 - No. 6)
Which of the following is a valid example of data validation?
Ensuring a phone number field contains only numeric characters.
Allowing any type of data in a field.
Limiting a date field to a specific range.
Allowing duplicate values in a field.
Обяснение
Data validation involves setting rules to ensure data meets specific criteria, such as the content and range of values.