Re: Query to find non-unique records

ewong wrote:
>
> I have a table:
> id integer,
> tag1 varchar2(5),
> tag2 varchar2(5),
> text clob
> ...
>
> The primary key is (id,tag1,tag2). I disabled the pk couple days ago
> and find that I am not able to enable it anymore because some new
> records don't have unique pks on the three columns. How can I do query
> to track down those non-unique records?
>
> Thanks.

select a.id, a.tag1, a.tag2 from table a, table b where a.id = b.id and a.tag1 = b.tag1 and a.tag2 = a.tag2 and a.rownum <> b.rownum;

:-) could be used in the where clause of a delete statement as well.

Regards

Michael Received on Wed May 02 2001 - 03:08:30 CDT