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05.31.2006 at 07:04AM PDT, ID: 21869577
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6.6

Update query not working

Asked by DrewK in Microsoft Access Database

I have a table with 325K records.

This table has lots of fields with long cryptic names.

So for ease of explanation, let's say it has the following fields:

First (text)
Second (text)
Third (text)
Amount (currency)
Flag (Yes/No)

Okay, so I'm trying to set [Flag] = Yes whenever I can match duplicates in the table.

This is easy for records that match exactly across all fields.

My problem is that many of the records are duplicated EXCEPT FOR the Amount field which is negative for one record, positive for the other.

I would like to use an Update query to match these records also, setting [Flag] = Yes.

My first attempt at this was with a recursive inner join using the Abs() function around the Amount field:

UPDATE table INNER table AS table_1 ON (table.First = table_1.First) AND (table.Second= table_1.Second) AND (table.Third= table_1.Third)
SET table.Flag = Yes
WHERE Abs([table].[Amount])=Abs([table_1].[Amount]);

Although it ran without error, it failed to update all of the records.

My second attempt was to concatenate the fields together and use a subquery:

UPDATE table
SET table.Flag = Yes
WHERE (First&Second&Third&Abs([Amount]))
in (SELECT (First&Second&Third&Abs([Amount])) FROM table);

This second query was taking soooo long that I hit [CTRL]+[Pause/Break] to stop it.

Any other ideas?

TIA,

Drew
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About this solution

Zone: Microsoft Access Database
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Solution Provided By: Flyster
Participating Experts: 1
Solution Grade: B
 
 
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