Compare SQL column against another column

Posted on By David Kittell

In a recent effort to clean up duplicates in my contacts I came across a script to assist me.

In my situation I have some contacts that have had the company name inserted as the first/last name.

List Records
SELECT id,
    [Company],
    [Title],
    [First Name],
    [Middle Name],
    [Last Name]
FROM [OutlookContacts]
WHERE Company LIKE '%' + [First Name] + '%'
ORDER BY [Last Name]

In my case almost all of the records could be modified to null the first and last name but if you need to limit the update modify the WHERE statement accordingly.

Update Records
UPDATE [OutlookContacts]
SET [First Name] = NULL,
    [Last Name] = NULL
WHERE Company LIKE '%' + [First Name] + '%'
Originally Posted on January 29, 2015
Last Updated on October 26, 2015
All information on this site is shared with the intention to help. Before any source code or program is ran on a production (non-development) system it is suggested you test it and fully understand what it is doing not just what it appears it is doing. I accept no responsibility for any damage you may do with this code.
Code MSSQL SQL

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