Re: select distinct values

Elain,

The query is returning the correct data. DISTINCT applies to the row as a whole. Since the NAME adds a new element, DISTINCT finds that 1MIKEY is different than 1JOEY.

How do you determine the 'first' row of the testid? Depending upon the access path (table/index), this could be a different row that what you expect. Do you only care about 1 row for each TESTID and STATUS combination?

Daniel

elain he wrote:

> Hi,
> Could someone shed some light on this.
>
> I'm trying to formulate a query to return distinct value on a column -
> testid.
>
> select * from testing;
> TESTID NAME STATUS
> ---------- -------------------- -----------
> 1 MIKE Y
> 1 JOE Y
> 1 JIM Y
> 2 AMY Y
>
> The output I'm expecting is
> TESTID NAME STATUS
> ---------- -------------------- -----------
> 1 MIKE Y
> 2 AMY Y
>
> The query should display the first occurence of the testid and ignore
> records with the same testid.
>
> thanks!
>
> elain
>
> _________________________________________________________________
> Instant message in style with MSN Messenger 6.0. Download it now FREE!
> http://msnmessenger-download.com
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: elain he
> INET: elainhe_at_hotmail.com
>
> Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> San Diego, California -- Mailing list and web hosting services
> ---------------------------------------------------------------------
> To REMOVE yourself from this mailing list, send an E-Mail message
> to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
> the message BODY, include a line containing: UNSUB ORACLE-L
> (or the name of mailing list you want to be removed from). You may
> also send the HELP command for other information (like subscribing).

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Daniel Fink
  INET: Daniel.Fink_at_Sun.COM

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).



text/x-vcard attachment: Card for Daniel Fink