Exercise

Checking phone numbers

As you learned in this lesson, the underscore _ symbol matches any single character.

You want to prepare a script that checks every contact_number value from the series table to get those numbers that don't start with three fives followed by a hyphen as such 555-, then three characters followed by another hyphen and finally, another four characters (555-###-####).

Can you find them?

Instructions

100 XP

Select the contact number.
Get the numbers of contacts that don't match the pattern.
Write the pattern that the numbers have to match.