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Re: dates

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: John Ensign <john(at)deepsnow(dot)org>
Cc: pgsql-novice(at)postgresql(dot)org
Subject: Re: dates
Date: 2006-05-17 17:05:31
Message-ID: 21255.1147885531@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-novice
John Ensign <john(at)deepsnow(dot)org> writes:
> select to_date( textfield1, 'MM-DD-YYYY') as startDate, CAST 
> ( textfield2, int4) as duration, startDate + duration as endDate.

That's got at least two problems: one, that's not the syntax of CAST,
you need to write CAST(textfield2 AS int4); and two, you can't reference
a SELECT output column from another column like that.  You could write

select
    to_date(textfield1, 'MM-DD-YYYY') as startDate,
    CAST(textfield2 AS int4) as duration,
    to_date(textfield1, 'MM-DD-YYYY') + CAST(textfield2 AS int4) as endDate
from whatever ...

			regards, tom lane

In response to

  • dates at 2006-05-17 15:53:32 from John Ensign

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Subject: Where to get more info. about the optimizer?
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