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Writing a SQL query to consolidate 2 fileds into the same format

Posted on 2014-09-30
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Last Modified: 2014-10-13
I have a table users which consists 2 column phoneNumber and Contact (there more columns into that table userID).

PhoneNUmber is an old Field (in the diffferent format xxx-xxx-xxxx,xxx.xxx.xxxx,(xxx)xxx-xxxx).Wjhat I want to do is to take that field and format it into this format (xxx-xxx-xxxx) and put it into the column Contact
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Question by:erikTsomik
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Expert Comment

by:Tapan Pattanaik
ID: 40352760
Hi erikTsomik,

If you want to retrieve "xxx-xxx-xxxx" from   "xxx-xxx-xxxx,xxx.xxx.xxxx,(xxx)xxx-xxxx)" you can use the below query.

select left(phoneNumber,12) from users ;
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by:erikTsomik
ID: 40352770
But that will give a mixture of numbers .What I need to is to take the phoneNumber  column and update to format xxx-xxx-xxxx and put it into the Contact column
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Expert Comment

by:Tapan Pattanaik
ID: 40352780
can you share more data with us !!!!!!
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LVL 69

Expert Comment

by:Scott Pletcher
ID: 40353240
You'll just end up with different formats again!

Strip the formatting from the stored data.  Formatting chars are not actual data in this case.

Add a formatting code, if you need it, to determine how to format the data when it is output/displayed.

C'mon, wouldn't format: xxxxxxxxxx be a lot simpler and more consistent all the way around!?
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Author Comment

by:erikTsomik
ID: 40353253
How would I strip it off can you give me an example
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Expert Comment

by:Scott Pletcher
ID: 40353264
You could use a function that stripped every nonnumeric char.

Or, if your data is reasonably clean, just embed REPLACEs:

UPDATE dbo.tablename
SET contact = REPLACE(REPLACE(REPLACE(REPLACE(phone_number, '-', ''), '.', ''), '(', ''), ')') --...
WHERE
    contact IS NULL OR contact = ''


Then add a CHECK to the table to prevent bad data from getting in:

ALTER TABLE table_name
ADD CONSTRAINT table_name__CK_contact CHECK(contact NOT LIKE '%[^0-9]%')
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LVL 19

Author Comment

by:erikTsomik
ID: 40353305
will constraint remove strip off unwanted data
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LVL 69

Expert Comment

by:Scott Pletcher
ID: 40353320
No, it will prevent non-numeric char(s) from being INSERTed into the contact column.
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LVL 69

Expert Comment

by:Scott Pletcher
ID: 40353326
For example:


create table table_name ( contact varchar(30) not null )

ALTER TABLE table_name
 ADD CONSTRAINT table_name__CK_contact CHECK(contact NOT LIKE '%[^0-9]%')
 go
 
 insert into table_name values('111')
 insert into table_name values('12345678990898098')
 insert into table_name values('1234b')
 go
 select * from table_name


If you wanted, you could also add a check to verify that the length is either 7 or 10 digits.
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Accepted Solution

by:
awking00 earned 500 total points
ID: 40355007
>>PhoneNUmber is an old Field (in the diffferent format xxx-xxx-xxxx,xxx.xxx.xxxx,(xxx)xxx-xxxx).<<
Do all PhoneNumber records contain 10 numeric characters, but with different formats using periods, dashes, spaces and/or parentheses? If so -
update table set contact =
substring(replace(replace(replace(replace(replace(phonenumber,'-',''),'.',''),'(',''),')',''),' ',''),1,3) + '-' +
substring(replace(replace(replace(replace(replace(phonenumber,'-',''),'.',''),'(',''),')',''),' ',''),4,3) + '-' +
substring(replace(replace(replace(replace(replace(phonenumber,'-',''),'.',''),'(',''),')',''),' ',''),7,4);
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