How to format unformated phone numbers Please...,

Question

Hello Good Evening, i have a phone number table which has single column in it with different style of phone numbers, i am trying to change it as required format
Required format are
1) Always start with a 1
2) Only Left 14 charcaters after spaces elimination (if there is any)
3) No spaces
4) special characters like (,),-,/ need to replace with '.'
5) if there is no separation/space then format 1.800.###.#### need to apply
create table #myphoneno (phone varchar(20))
Insert into #myphoneno values  ('[phone]' ) --- Rule 1,3,4
Insert into #myphoneno values  ('1-800-222-SAVE(7283)') --- Rule 2,4
Insert into #myphoneno values  ('[phone]') --Rule 3,4
Insert into #myphoneno values  ('18002288775')  ---Rule 5
Insert into #myphoneno values  ('(800) 2223415')--- Rule 1,3,4,5
Insert into #myphoneno values  ('(800) 2-MOHAN')--- Rule 1,,3,4
Insert into #myphoneno values  ('1-800-228-4995') ---Rule 4
Insert into #myphoneno values  ('877-233-0112')---- Rule 1,4
Insert into #myphoneno values  ('800 228 3315')--- 1,3,4
Insert into #myphoneno values  ('18002284225')---Rule 5
Insert into #myphoneno values  ('800/219-1140') --- Rule 1,4
Insert into #myphoneno values  ('1 (855) ECO-8107') -- Rule 3,4
Insert into #myphoneno values  ('(888) BOM4BQC')-- Rule1,3,4
Insert into #myphoneno values  ('877-421K-MOX')-- Rule 1,4
Select * from #myphoneno
---- Expected results as below
create table #myphonenoExpected (phone varchar(20))
Insert into #myphonenoExpected values  ('1.866.987.3847' )
Insert into #myphonenoExpected values  ('1.800.222.SAVE')
Insert into #myphonenoExpected values  ('1.800.111.4015')
Insert into #myphonenoExpected values  ('1.800.228.8775')
Insert into #myphonenoExpected values  ('1.800.222.3415')
Insert into #myphonenoExpected values  ('1.800.2.MOHAN')
Insert into #myphonenoExpected values  ('1.800.228.4995')
Insert into #myphonenoExpected values  ('1.877.233.0112')
Insert into #myphonenoExpected values  ('1.800.228.3315')
Insert into #myphonenoExpected values  ('1.800.228.4225')
Insert into #myphonenoExpected values  ('1.800.219.1140')
Insert into #myphonenoExpected values  ('1.855.ECO.8107')
Insert into #myphonenoExpected values  ('1.888.BOM.4BQC')
Insert into #myphonenoExpected values  ('1.877.421K.MOX')
Select * from #myphonenoExpected
Thank you in advance
Asiti

Answer 1

USE [Northwind]
create table #myphoneno (phone varchar(20))
Insert into #myphoneno values ('[phone]' ) --- Rule 1,3,4
Insert into #myphoneno values ('1-800-222-SAVE(7283)') --- Rule 2,4
Insert into #myphoneno values ('[phone]') --Rule 3,4
Insert into #myphoneno values ('18002288775') ---Rule 5
Insert into #myphoneno values ('(800) 2223415')--- Rule 1,3,4,5
Insert into #myphoneno values ('(800) 2-MOHAN')--- Rule 1,,3,4
Insert into #myphoneno values ('1-800-228-4995') ---Rule 4
Insert into #myphoneno values ('877-233-0112')---- Rule 1,4
Insert into #myphoneno values ('800 228 3315')--- 1,3,4
Insert into #myphoneno values ('18002284225')---Rule 5
Insert into #myphoneno values ('800/219-1140') --- Rule 1,4
Insert into #myphoneno values ('1 (855) ECO-8107') -- Rule 3,4
Insert into #myphoneno values ('(888) BOM4BQC')-- Rule1,3,4
Insert into #myphoneno values ('877-421K-MOX')-- Rule 1,4
;with mycte as(
Select phone,
replace(replace(replace(replace(replace( replace(phone,'(','.'),')','.'),'-','.'),'/','.'),' ','.'),'..','.') tmpCol
from #myphoneno)
,mycte1 as (select phone, case when left(tmpCol,1)='1' then tmpCol else '1.'+tmpCol end tmpcol1 from mycte)
select phone, Case when charindex('.', tmpcol1) >0 then left(replace(tmpcol1,'..','.') ,14) Else
substring (tmpcol1,1,1)+'.'+ substring (tmpcol1,2,3)+'.'
+ substring(tmpcol1,5,3)+'.' +substring (tmpcol1,8,4) end as newPhone from mycte1
drop table #myphoneno