[0-9][0-9][0-9][0-9]-[0-9][0-9][0-9]-[0-9][0-9][0-9] Example: 4356-555-555
However, while populating the table that stores the supplier details with the sample data, you find that even if you leave the preceding fields blank, no error is displayed. In addition, you are able to populate the field that stores the phone number with any number or character.
Analyze the preceding problem and implement the required constraints in the corresponding table. [5 marks]
Alter the corresponding table to add constraints so that the preceding requirements can be implemented. [5 marks]
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