Question

I have a database where each row has an id, a URL, and an XML. The IDs are unique, but URLs column can have duplicates. I need all the URLs, without duplicates, and for each URL I need the id and XML.

If I ask only for the URL and the Id, I use the following query:

select URL, max(ID) as ID from T1 group by URL 

And all is working great.

But when I want also the XML, and I use the following query:

select URL, max(ID) as ID, XML from T1 group by URL 

I get the following error:

ISC ERROR CODE:335544569 ISC ERROR MESSAGE: Dynamic SQL Error SQL error code = -104 user name required 

What am I doing wrong?

Thanks,

Dikla

Thanks for the answers. I want to add an explanation:
In case of duplicate URLs, I don’t care which of them will be returned. But I need to get them without duplicates, even if the XML is different between the rows. Is it possible?
Thanks!

Answer 1

select id, url, xml from table1 where id in (     select min(id)     from table1     group by url) 

would give you rows with duplicate urls removed (and only the first instance of duplicate urls included)