Re: Dates

From: Paul Drake <discgolfdba_at_yahoo.com>
Date: Fri, 25 Jun 2004 09:07:19 -0700 (PDT)
Message-ID: <20040625160719.27499.qmail@web20420.mail.yahoo.com>

Dan Tow <dantow_at_singingsql.com> wrote:,
> as is good practice) "WHERE
> TRUNC(NC_DATE_CLS) = TO_DATE('25-JUN-04')".

Dan,

trunc(date_var) on the left hand side of a where clause is so evil, it pains me to see it anywhere in print.

it makes me want to wield the hammer of a function based index until the developer fixes their mistake and recodes it properly.

sorry to rip your head off on this one (I liked your book quite a bit) and this only matters if the date column was indexed - but - this is one of the most irritating pieces of code that I've ever run across, and I see it very frequently at the top of a statspack report.

proper filtering against dates is covered in depth at the ask tom site.

Paul

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Received on Fri Jun 25 2004 - 11:04:22 CDT