--------------------------------------------
On Sat, 12/10/16, ***@yahoo.com [firebird-support] <firebird-***@yahoogroups.com> wrote:
Subject: Re: [firebird-support] "EXTRACT (YEAR FROM DT.DATA) <= 2016" or "DT.DATA <= '12/31/2016'"
To: firebird-***@yahoogroups.com
Date: Saturday, December 10, 2016, 12:41 AM
Â
--------------------------------------------
On Fri, 12/9/16, LtColRDSChauhan ***@gmail.com
[firebird-support] <firebird-***@yahoogroups.com>
wrote:
Subject: Re: [firebird-support] "EXTRACT (YEAR FROM
DT.DATA) <= 2016" or "DT.DATA <=
'12/31/2016'"
To: firebird-***@yahoogroups.com
Date: Friday, December 9, 2016, 10:45 PM
Â
On Sat, Dec 10, 2016 at
12:37 AM, Louis Kleiman ***@sstms.com
[firebird-support]
<firebird-***@yahoogroups.com>
wrote:
Â
You can create an expression
index on EXTRACT (YEAR FROM DT.DATA)Â to get performance
improvements in your first expression, but an index on
plain
ol' DT.DATA would be more flexible -- it would
provide
assistance in more cases than the expression index. The
plain ol' column index would speed up the DT.DATA
<=
'12/31/2016', but not the EXTRACT...
expression.
As always in our
business, tradeoffs...
On Fri, Dec
9, 2016 at 12:12 PM Luigi Siciliano
***@tiscalinet.it
[firebird-support] <firebird-***@yahoogroups.
com> wrote:
Il 09/12/2016 15.47, Mark Rotteveel
***@lawinegevaar.nl
[firebird-support] ha scritto:
Â
Could
you please put all pertinent information of your
question in the
body, and not only in the subject. It
makes
questions a
lot easier to
read (especially on mobile devices).
I'm sorry, I rewrite the question:
 what is more performant: "EXTRACT (YEAR FROM
DT.DATA) <= 2016"
or "DT.DATA <=
'12/31/2016'"?DT.DATA
<= '31.12.2016' /* date format dd.mm.yyyy
*/could be ignoring the hours part ie from
'31.12.2016, 00:00:00.001' to '31.12.2016,
23:59:59.999'better useDT.DATA
< '1.1.2017' Â
I
would prepare myself for a table that grows rapidly.
Is
the same in FB 2.5.6 or 3.0.1?
Thanks
--
Luigi
Siciliano
--------------------------
--
 Regards,
 Lt Col (Retd) Rajiv D.S. ChauhanÂ
in.linkedin.com/in/ltcolrdschauhan
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an. - Nicolae Balcescu intemeiaza la Londra un Comitet
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si amnistie pentru revolutionarii exilati. 3 iul. -
Apare la lasi publicatia Zimbrul iar la 8 20
septembrie la Paris revista Romania viitoare . 12
dec. - Cancelaria imperiala de la Viena ridica Episcopia de
la Blaj la rang de Mitropolie.18501 oct. - Instituirea
teritoriului vamal unic a Imperiului Habsburgic. 29 nov. -
Prusia accepta refacerea Confederatiei germane acordul
austro-prusian de la Olmiitz .
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Porturile si comunicatiile. Dupa 1829 s-a construit podul de peste Olt de la