RE: SQL question

From: Jamadagni, Rajendra <Rajendra.Jamadagni_at_espn.com>
Date: Wed, 29 Jan 2003 12:09:49 -0800
Message-ID: <F001.0053DB28.20030129120949@fatcity.com>

The non-working code in your example should be

select count(*)
from (select distinct ename,job from emp) /

It appears that cound takes only one parameter ... not two. Raj

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Rajendra Jamadagni MIS, ESPN Inc.
Rajendra dot Jamadagni at ESPN dot com
Any opinion expressed here is personal and doesn't reflect that of ESPN Inc.

QOTD: Any clod can have facts, but having an opinion is an art!

-----Original Message-----
Sent: Wednesday, January 29, 2003 1:19 PM To: Multiple recipients of list ORACLE-L

Hello Listers,

How to find out the COUNT of DISTINCT values of multiple columns?

For eg.

SQL> SELECT DISTINCT ename FROM emp;
-- This works.

SQL> SELECT COUNT(DISTINCT ename) FROM emp;
-- So does this.

SQL> SELECT DISTINCT ename, job FROM emp;
-- And this too.

SQL> SELECT COUNT(DISTINCT ename, job) FROM emp;
-- So why does this fail?

I can do a COUNT(DISTINCT ename || job), but that doesn't seem to be elegant way of doing it.

I have a feeling I might be missing some fairly basic syntax, but feeling dumb is better than suspense.

Thanks & regards,
Charu.

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Author: Charu Joshi
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Author: Jamadagni, Rajendra
  INET: Rajendra.Jamadagni_at_espn.com

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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). Received on Wed Jan 29 2003 - 14:09:49 CST