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Posted by Erland Sommarskog on 05/17/05 17:27
Julia Hδrtfelder via SQLMonster.com (forum@nospam.SQLMonster.com) writes:
> I need help with a Statement!
> I am working with an Access2000 DB.
>...
> I need a Statement that deletes the surplus records where 'Datum' and
> 'Linie' are identical to another record. 1 record has to remain of course.
> I thought of something like this.
>
> DELETE FROM tbAuswert
> WHERE EXISTS(
> SELECT *
> FROM tbAuswert
> WHERE (Linie AND Datum)
> IN (
> SELECT Linie AND Datum AS Suchkrit
> FROM tbAuswert
> GROUP BY Suchkrit
> HAVING ((Count(Suchkrit)>1)
> )
> )
>
> But I get an error:
> You wanted to execute a Query that did not have the following expression
> 'Not Linie = 0 And Not Datum = 0' in its Aggregatefunction
>
> Perhaps you ccan help me.
If you don't have a primary that uniquely identifies each row, then
this will be very difficult, as SQL is designed to operate only from the
data in the tables.
It's possible that you can add a column that gives you a unique ID. Had
you been using SQL Server, I could have showed you how. However, since
you are using Access, you are better off posting your question to a
forum for Access. There are considerable differences between the SQL in
SQL Server and Access.
--
Erland Sommarskog, SQL Server MVP, esquel@sommarskog.se
Books Online for SQL Server SP3 at
http://www.microsoft.com/sql/techinfo/productdoc/2000/books.asp
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