Solved

clean tel number

Posted on 2014-03-22
12
267 Views
Last Modified: 2014-03-25
The tel numbers in my database may have these characters

' ', '-',' (' and ')'

So I use the below in my query to clean them.

SUBSTR(replace(replace(replace(replace(CE.NUMBER,' ',''),'-',''),'(',''),')',''), -10, 10)

Is there a faster alternative ?
Thank you
0
Comment
Question by:myyis
  • 5
  • 3
  • 2
  • +2
12 Comments
 
LVL 38

Assisted Solution

by:Aaron Tomosky
Aaron Tomosky earned 250 total points
ID: 39948179
Don't think of it as cleaning a phone number, think of it as selecting all numbers or removing all non numbers
http://sqlblogcasts.com/blogs/simons/archive/2008/02/26/String-cleaning-with-TSQL.aspx
0
 

Author Comment

by:myyis
ID: 39948446
Thank you for the method you've posted.

Which one is faster? Yours?
0
 
LVL 27

Expert Comment

by:yodercm
ID: 39948524
You can test them, but both methods go through the string character by character multiple times.

A simple method that goes through only once would be something like

<?php

$oldstring = "%(913) 285-4589,(812)873-8432";

$newstring="";
for ($i=1;$i<=50;$i++)
{
  $char = SUBSTR($oldstring,$i,1);
  if (is_numeric($char))
    $newstring .= $char;
}

echo "oldstring $oldstring<br>";
echo "newstring $newstring<br>";

exit();
0
U.S. Department of Agriculture and Acronis Access

With the new era of mobile computing, smartphones and tablets, wireless communications and cloud services, the USDA sought to take advantage of a mobilized workforce and the blurring lines between personal and corporate computing resources.

 

Author Comment

by:myyis
ID: 39948528
But I need it on mysql, not php
0
 
LVL 27

Expert Comment

by:yodercm
ID: 39948530
Ah, sorry, things are so much easier to do in php, I didn't even notice you were restricted to MySQL.  Does it HAVE to be in the query?  Is there no way you can use php for this?
0
 

Author Comment

by:myyis
ID: 39948537
No I have to do it on mysql
0
 
LVL 13

Expert Comment

by:AielloJ
ID: 39948593
myyis:

There isn't a way to do it in query using MySQL.  Other databases like Oracle, and SQL-Server, have built-in functions that will do this.

There's a question or two that needs to be answered to best solve this problem:

1) Is this a one-time cleanup, or an ongoing insertion of compromised data into the database.

If it's a one-time-cleanup, then I suggest running a series of update queries to clean up the database.  If it's an on-going insertion of bad data, then I strongly suggest the proper course of action is to address the root cause of the problem.  While this may encounter resistance from some parties, it ALWAYS turns into one maintenance issue after another.  Code must always be added to every query or report to deal with the trash.  This is costly, and violates one of the major best practices regarding databases and their content.

Best regards,

AielloJ
0
 

Author Comment

by:myyis
ID: 39948661
The method that I wrote in the question and the alternative of Aaron Tomosky does the job for me.

What I need to learn is which is faster, nothing more, thank you
0
 
LVL 38

Expert Comment

by:Aaron Tomosky
ID: 39948772
The proper way is to store only numbers. write a query to clean what you have and update the database. Then add code to your front end so only numbers get added. That way your output query is fast because it doesn't transform anything.
0
 

Author Comment

by:myyis
ID: 39948803
Thank you Aaron,
I need the format of the numbers, so I don't have chance to get rid of those symbols.

I only want to hear  which method is "theoretically"  faster.
Yours or mine?
Thank you
0
 
LVL 38

Expert Comment

by:Aaron Tomosky
ID: 39948818
Even if they are close, mine will handle any format you through at it, so it's much safer. Yours is only replacing specific characters.
0
 
LVL 26

Accepted Solution

by:
Zberteoc earned 250 total points
ID: 39950381
Your solution is THE FASTEST by far as long you know for sure that you only have to eliminate a small number of characters, 3 in this case, and what exactly those are. The reason ia that the REPLACE is an internal function built special for this purpose and is quite efficient. When it comes to regular expression you can do more powerful things but it will be a bit slower, especially if you use xml tricks, which are actually meant for other purposes. It will work, however.
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction In this article, I will by showing a nice little trick for MySQL similar to that of my previous EE Article for SQLite (http://www.sqlite.org/), A SQLite Tidbit: Quick Numbers Table Generation (http://www.experts-exchange.com/A_3570.htm…
Password hashing is better than message digests or encryption, and you should be using it instead of message digests or encryption.  Find out why and how in this article, which supplements the original article on PHP Client Registration, Login, Logo…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question