-- Try:
/* format (123) 456-7 to 123-4567 */
select SUBSTRING('(123) 456-7', 2, 3) + '-' + SUBSTRING('(123) 456-7', 7, 3) + SUBSTRING('(123) 456-7', 11, 1)
/* format 123-456-7890 to (123) 456-7890 */
select '(' + SUBSTRING('123-456-7890', 1, 3) + ') ' + SUBSTRING('123-456-7890', 5, 3) + '-' + SUBSTRING('123-456-7890', 9, 4)
/* format 1234567 to 123-4567 */
select SUBSTRING('1234567', 1, 3) + '-' + SUBSTRING('1234567', 4, 4)
/* format 1234567890 to (123) 456-7890 */
select '(' + SUBSTRING('1234567890', 1, 3) + ') ' + SUBSTRING('1234567890', 4, 3) + '-' + SUBSTRING('1234567890', 7, 4)
-- Format:
/* format (123) 456-7 to 123-4567 */
update tableAAA set phone= SUBSTRING(phone, 2, 3) + '-' + SUBSTRING(phone, 7, 3) + SUBSTRING(phone, 11, 1)
where len(phone)=11 and CHARINDEX('(',phone)=1 and CHARINDEX(')',phone)=5 and CHARINDEX('-',phone)=10
/* format 123-456-7890 to (123) 456-7890 */
update tableAAA set phone= '(' + SUBSTRING(phone, 1, 3) + ') ' + SUBSTRING(phone, 5, 3) + '-' + SUBSTRING(phone, 9, 4)
where len(phone)=12 and CHARINDEX('-',phone)=4 and substring(phone,8,1)='-' and charindex('(',phone)= 0 and charindex(')',phone)= 0
/* format 1234567 to 123-4567 */
update tableAAA set phone=SUBSTRING(phone, 1, 3) + '-' + SUBSTRING(phone, 4, 4)
where len(phone)=7 and charindex('-',phone)= 0 and charindex('(',phone)= 0 and charindex(')',phone)= 0
/* format 1234567890 to (123) 456-7890 */
update tableAAA set phone= '(' + SUBSTRING(phone, 1, 3) + ') ' + SUBSTRING(phone, 4, 3) + '-' + SUBSTRING(phone, 7, 4)
where len(phone)=10 and charindex('-',phone)= 0 and charindex('(',phone)= 0 and charindex(')',phone)= 0