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Data Bases > Pgsql Novice > Re: Calculating...
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Re: Calculating repeating events - functionality lost with

by psql-novice@[EMAIL PROTECTED] (Daniel) Jul 2, 2008 at 06:37 PM

>> I need to know whether a repeating event occurs or not on a particular
>> day. I currently have the following information:
>>
>> date of first occurrence (date)
>> repeat frequency (interval)
>> date to check (date)
>>
>> My instinct says that I should be using a mod here to calculate whether
>> the remainder is zero when the difference between the two times is
>> divided by the repeat frequency. Unfortunately this is not possible
>> since as far as I am aware intervals only specify a time length and not
>> two dates.
> Huh?  If you only need this good to day precision, as your reference to
> dates suggests, then just subtract the two dates (which will give an
> integer number of days) and modulo by the repeat frequency (also given
> as an integer number of days).
>
> If that doesn't satisfy your requirements, you need to be more clear
> about what they are.
Apologies for the lack of clarity.

Try repeat_frequency='1 month'

Netzach

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 5 Posts in Topic:
Calculating repeating events - functionality lost with the demis
psql-novice@[EMAIL PROTEC  2008-07-02 13:21:01 
Re: Calculating repeating events - functionality lost with the d
tgl@[EMAIL PROTECTED] (T  2008-07-02 10:57:55 
Re: Calculating repeating events - functionality lost with
psql-novice@[EMAIL PROTEC  2008-07-02 18:37:28 
Re: Calculating repeating events - functionality lost with the d
tgl@[EMAIL PROTECTED] (T  2008-07-02 13:01:59 
Re: Calculating repeating events - functionality lost with
psql-novice@[EMAIL PROTEC  2008-07-03 12:29:56 

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tan12V112 Fri Dec 5 6:27:21 CST 2008.