How to format a numeric column as phone number in SQL

Question

I have table in the database with a phone number column. The numbers look like this:

123456789

I want to format that to look like this:

Answer 1

I found that this works if wanting in a (123) - 456-7890 format.

UPDATE table 
SET Phone_number =  '(' +  
                    SUBSTRING(Phone_number, 1, 3) 
                    + ') ' 
                    + '- ' +
                    SUBSTRING(Phone_number, 4, 3) 
                    + '-' +
                    SUBSTRING(Phone_number, 7, 4)