Re: Computing percentage change between tables
From: Álvaro G. Vicario <alvaro.NOSPAMTHANX_at_demogracia.com.invalid>
Date: Tue, 21 Jul 2009 11:15:58 +0200
Message-ID: <h441cl$mnt$1_at_news.eternal-september.org>
novice82 escribió:
> On Jul 20, 5:14 pm, "Álvaro G. Vicario"
> <alvaro.NOSPAMTH..._at_demogracia.com.invalid> wrote:
Date: Tue, 21 Jul 2009 11:15:58 +0200
Message-ID: <h441cl$mnt$1_at_news.eternal-september.org>
novice82 escribió:
> On Jul 20, 5:14 pm, "Álvaro G. Vicario"
> <alvaro.NOSPAMTH..._at_demogracia.com.invalid> wrote:
>> novice82 escribió:
>>
>>> another question, that I have is, how does sql handle the computation,
>>> if a value in a particular field is divided by 0 ?
>> It raises a ORA-01476 error ("divisor is equal to zero"). You can test
>> it yourself:
>>
>> SELECT 1/0
>> FROM DUAL
> I tried the following :
>
> SELECT T1.AcountNo, T1.Balance, T2.Balance, T1.Balance/CASE T2.Balance
> WHEN 0 THEN NULL END)
> FROM Temp1 T1, Temp2 T2
> WHERE T1.AccountNo = T2.AccountNo
> AND ((T1.Balance / T2.Balance > 1.1)
> OR (T1.Balance / T2.Balance < 0.9))
>
> But i'm still unable to circumvent the zero divisor problem.
You have to fix it in all the divisions, not only the SELECT clause.
-- -- http://alvaro.es - Álvaro G. Vicario - Burgos, Spain -- Mi sitio sobre programación web: http://borrame.com -- Mi web de humor satinado: http://www.demogracia.com --Received on Tue Jul 21 2009 - 04:15:58 CDT