Compare And Delete

May 1, 2008

I'm trying to setup a delete query that cleans out the records in one table that are also in another table. I was trying to use the address field (would use name but one table splits it First and Last and the other doesn't) but I just can't seem to run the delete query when using a join

anyone have any ideas on how I could setup this delete query?

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Compare Same Data - Delete

Aug 15, 2006

Hi guys,

I have 23k records

I have run the wizard to find all the duplicates according to one field.

So i have the results, except that some of the records contain nothing within the searchable field - so it returns all the records with nothing in the searchable field as duplicates.

How would i modify the query to perform the search but exclude the records with no data.

The SQL query below is the default wizard output for find duplicates, how would i change this??

SELECT Master.EMAIL, Master.MemID, Master.MEMBERNO, Master.FIRSTNAME, Master.LASTNAME, Master.POSITION, Master.ORGAN, Master.ADDRESS1, Master.ADDRESS2, Master.ADDRESS3, Master.ADDRESS4, Master.COUNTY, Master.COUNTRY, Master.POSTCODE, Master.SALUTATION, Master.MOBILE, Master.TELEPHONE, Master.WORKPHONE, Master.FAX, Master.RATE, Master.CLASS, Master.ADDREF, Master.DATEJOIN, Master.WEB, Master.Field26
FROM Master
WHERE (((Master.EMAIL) In (SELECT [EMAIL] FROM [Master] As Tmp GROUP BY [EMAIL] HAVING Count(*)>1 )))
ORDER BY Master.EMAIL;


Another thing is, once i have the result... which query would i use to actually delete the duplicate data??

Cheers, and advance thanks!! :cool:

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I have a query based on two tables, joined on one field (this field is the primary key in Table A. Table B doesn't have a primary key). When working inside this query, it gives me the option to delete records. However, when I try, the row disappears from the query but then if I save and close and either re-open table A or the resulting query, that record is back. It doesn't actually delete. If I go to table A directly and delete it, it's gone for good.

How can I make it so that when I delete the record inside the query it actually deletes? And if that's not an option, can I make it so that it doesn't seem like I can delete records inside the query so that people don't make the mistake?

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hello, i have checked out the forum for pevious Q's to this problem and found the below.

http://www.access-programmers.co.uk/forums/showthread.php?t=80692&highlight=compare+tables

only problem is thats its writen at a bit too technicle a level from where i am. i've done some investigation into the problem though.

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