Solved

Identifying (similar) Names and Addresses

Posted on 2014-02-10
2
277 Views
Last Modified: 2014-02-10
Hi,

I have 50,000 names and addresses from multiple sources.

The wil be at least 30% duplication.

I.e. One specific name and address may be there more than once but many NOT be 100% identical.

E.g.
John Smith, 1 High Street, London
John Smith, 1 The High Street London

Can anyone guide me to a utility which would identify names/addresses that are not quite 100% matched.

Any thoughts out there?
0
Comment
Question by:Patrick O'Dea
2 Comments
 
LVL 84

Accepted Solution

by:
Scott McDaniel (Microsoft Access MVP - EE MVE ) earned 500 total points
ID: 39847423
That's going to be difficult to do.

You could use something like a Soundex algorithm to "rank" each one compared to the others. Essentially this would give you the greatest chance of duplicates for each entry, and you could then decide what to do with them.

Here's the wikipedia take on the Soundex stuff: http://en.wikipedia.org/wiki/Soundex

Essentially it involves replacing the characters in a string with numeric values, and then comparing the results. There are many different types of these algorithms, for various purposes. One example is this:

Consider the word "Cranston"

You keep the first letter ("C"), and then remove all other vowels, and any occurrence of letters y, h and w, so you're left with this:

Crnstn

You then assign values to the next 3 items. Using the wikipedia method, that would be:

C652

The letter "r" is = 6, the letter "n" is = 5 and the letter "s" = 2.

You'd do the same for all the strings (and you could go out further than 3 letters if you'd prefer), and store this value in a column in that table. You then sort by that column, and you can see immediately which strings are most closely related.

Allen browne has one here: http://allenbrowne.com/vba-Soundex.html. It uses a setup very much like what is described in the wikipedia link.
0
 

Author Closing Comment

by:Patrick O'Dea
ID: 39848501
Thanks, I will experiment.  (I heard about soundex years ago).
0

Featured Post

VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

Question has a verified solution.

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

Entity Framework is a powerful tool to help you interact with the DataBase but still doesn't help much when we have a Stored Procedure that returns more than one resultset. The solution takes some of out-of-the-box thinking; read on!
Describes a method of obtaining an object variable to an already running instance of Microsoft Access so that it can be controlled via automation.
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

809 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