Re: SQL for top 100 values

From: Stephane Faroult <sfaroult_at_oriole.com>
Date: Thu, 10 Jan 2002 10:51:15 -0800
Message-ID: <F001.003ECC94.20020110102247@fatcity.com>

Deen Dayal wrote:
>
> I tried to run it in Oracle 7.3.4, it comes up with a syntax error
>
> Here is the SQL
> select x.fein,x.open_bal
> from (select sf_get_fein(employer_id) fein, nvl(total_open_balance_amt,0)
>open_bal
> from employer
> order by open_bal desc ) x
> where rownum < 101
>
> Here is what I get
>
> SQLWKS> select x.fein,x.open_bal
> 2> from (select sf_get_fein(employer_id) fein,
>nvl(total_open_balance_amt,0) open_bal
> 3> from employer
> 4> order by open_bal desc ) x
> 5> where rownum < 101
> 6>
> order by open_bal desc ) x
> *
> ORA-00907: missing right parenthesis
>
> Is it because I am on a lower version
>
> Thanks
> Deen

7.3 does not accept ORDER BY in views (inline or otherwise). There is an old trick available however :
select sf_get_fein(e1.employer_id) fein, nvl(e1.total_open_balance_amt,0) open_bal from employer e1
where 99 <= (select count(*)

             from employer e2
             where e2.total_open_balance_amt >=

nvl(e1.total_open_balance_amt)
order by 2 desc

Should more or less give you what you want. Add an index on total_open_balance_amt if you do not want the query to run for hours.

-- 
Regards,

Stephane Faroult
Oriole Ltd
-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Stephane Faroult
  INET: sfaroult_at_oriole.com

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Received on Thu Jan 10 2002 - 12:51:15 CST