RE: query for top customer

From: Thomas, Kevin <Kevin.Thomas_at_calanais.com>
Date: Mon, 10 Sep 2001 08:19:28 -0700
Message-ID: <F001.00388254.20010910073519@fatcity.com>

Try this...

DECLARE
  CURSOR c_sales IS
  SELECT *
    FROM sales
   ORDER BY sales desc;
  r_sales c_sales%rowtype;
  l_count NUMBER := 0;
BEGIN
  OPEN c_sales;
  DBMS_OUTPUT.PUT_LINE( 'Customer' || ' ' || 'Sales' );   WHILE l_count < 3 LOOP
    FETCH c_sales INTO r_sales;
    DBMS_OUTPUT.PUT_LINE( r_sales.customer || ' ' || r_sales.sales );     l_count := l_count + 1;
  END LOOP;
  CLOSE c_sales;
END;
/

I did it as a pl/sql block because you can't be fancy (well not in 7.3.4) and use ROWNUM with an ORDER BY. I was going to suggest just doing:

SELECT *
FROM sales
WHERE rownum < 4
ORDER BY sales DESC;

But alas, this doesn't work...try the above, it's nasty but quick...

HTH, Kev.

Kevin Thomas
Technical Analyst
Deregulation Services
Calanais Ltd.
(2nd Floor East - Weirs Building)
Tel: 0141 568 2377
Fax: 0141 568 2366
http://www.calanais.com

-----Original Message-----
Sent: 10 September 2001 14:30
To: Multiple recipients of list ORACLE-L

how to write a query to find top 3 customer based on their sales .
eg.
TABLE A

customer       sales
A100          100
A101           200
A102           105
A103            109
A104            108

RESULTS should be..
A101       200
A103        109
A104        108

Thanks in advance
Brajesh

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Author: Thomas, Kevin
INET: Kevin.Thomas_at_calanais.com

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