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Thread: SQL 92 and Update Joins.

James Scott
Posts: 1

SQL 92 and Update Joins. Your last visit to this thread was on 1/1/1970 12:00:00 AM

Posted: 28 Mar 06 12:21 PM

Can I use a SQL 92 Join like :-

UPDATE t1 SET t1.C_phno = t2.phno
FROM C_Contact t1
JOIN C_Contact_EXT t2 ON t1.Contactid = t2.Contactid
WHERE t1.lastname is null and t1.phno is not null

via the OLEdb provider (SLX version 6.1) . Is this supported by the SLX Oledb adapter and will it run the remote SQL Databases.

Thanks.

[Reply][Quote]

Ryan Farley
Posts: 2265

Re: SQL 92 and Update Joins. Your last visit to this thread was on 1/1/1970 12:00:00 AM

Posted: 28 Mar 06 3:26 PM

I'm not 100% sure on this, but IIRC "update from" statements yield sql parse errors via the SLX provider in 6.1. I think that might have been fixed in 6.2 (or maybe not til 6.2.1).

Best bet is to give it a whirl and see what happens

[Reply][Quote]

Peter H
Posts: 17

Re: SQL 92 and Update Joins. Your last visit to this thread was on 1/1/1970 12:00:00 AM

Posted: 29 Mar 06 12:20 AM

Generally, the provider likes you to clearly identify the exact record by key that want to update, rather than some group identified by a general "where" statement.

So, you need to convert your update statement into a whole series of update statements, one for each c_contact record that needs to be updated.

To so this, change the initial update statement into a select that creates the update statements that you need, and pass those statements to the provider as you retrieve them (one by one).

So, what you need to do is pass the results of this select statement back to the provider:
select
'UPDATE C_Contact SET C_phno = ''' + t2.phno + ''' where Contactid = ''' + t2.Contactid + ''''
FROM C_Contact t1
inner JOIN C_Contact_EXT t2 ON t1.Contactid = t2.Contactid
WHERE t1.lastname is null and t1.phno is not null

Hope this helps,
Peter H

[Reply][Quote]

Norman Rice
Posts: 5

Re: SQL 92 and Update Joins. Your last visit to this thread was on 1/1/1970 12:00:00 AM

Posted: 29 Jun 06 2:37 PM

Here is the format that SLX will accept:

update c_contact set c_phno = (select x.phno from c_contact_ext x
where c_contact.contactid = x.contactid)
where lastname is null and phno is not null

Norm

[Reply][Quote]

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