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.

Data validation involves setting rules to ensure data meets specific criteria, such as the content and range of values.