RE: Numeric comparison in DECODE statement

From: Lord, David - CSG <David.Lord_at_hayscsg.com>
Date: Mon, 20 May 2002 08:13:35 -0800
Message-ID: <F001.00464A80.20020520081335@fatcity.com>

You cannot use predicates directly, but you can use the SIGN operator to find out whether (in_value - 60) is less than, equal to, or greater than zero: -

select
  decode(
    sign(to_number(in_value) - 60),
    -1, in_value || ' minutes',
    to_char(to_number(in_value)/60) || ' hours' from
  dual;

HTH
David Lord

> -----Original Message-----
> From: Yexley Robert D Contr Det 1 AFRL/WSI
> [mailto:Robert.Yexley_at_wpafb.af.mil]
> Sent: 20 May 2002 16:08
> To: Multiple recipients of list ORACLE-L
> Subject: Numeric comparison in DECODE statement
>
>
> I was wondering if anyone might have tried this before,
> because I can't seem to get it to work. I'd like to be able
> to determine which unit of measure to concatenate to a value
> by using a decode statement in the query. I have a column in
> the database that stores time in minutes, and I'd like to be
> able to show the output in minutes if the value is less than
> 60, but in hours (such as 3.27 hours) if the value is greater
> than 60. So far I've tried the following statement, but it
> seems to be blowing up on the first comparison operator:
>
> SELECT decode(in_value, to_char(to_number(in_value) <=
> to_number('60')), to_char(in_value)||' minutes',
> to_char(to_number(in_value) > to_number('60')),
> to_char(in_value/60, '9.99')||' hours')
> FROM dual
> /
>
> I'm selecting from dual just until I can get the query
> working at all. Is what I'm trying to do even possible? Any
> help or ideas would be greatly appreciated. Thanks in advance.
>
> _YEX_
>
> /*
> || Robert D. Yexley
> || Oracle Programmer/Analyst
> || Easylink Services Corporation
> || Professional Services
> || Contractor - Wright Research Site MIS
> || Det-1 AFRL/WSI Bldg. 45 Rm. 062
> || (937) 255-1984
> || robert.yexley_at_wpafb.af.mil
> || <)))><
> */
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Yexley Robert D Contr Det 1 AFRL/WSI
> INET: Robert.Yexley_at_wpafb.af.mil
>
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---

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---

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Lord, David - CSG
  INET: David.Lord_at_hayscsg.com

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Received on Mon May 20 2002 - 11:13:35 CDT