| Subject | Re: [firebird-support] Help creating expression index |
|---|---|
| Author | Mr. John |
| Post date | 2019-07-17T16:19:11Z |
great solution
thanks!
On Wednesday, July 17, 2019, 06:59:44 PM GMT+3, Dimitry Sibiryakov sd@... [firebird-support] <firebird-support@yahoogroups.com> wrote:
17.07.2019 17:54, 'Mr. John' mr_johnmr@... [firebird-support] wrote:
> I want to create a index to improve a query like that:
> SELECT * FROM MYTABLE WHERE EXTRACT(YEAR FROM datein)=2019 AND EXTRACT(MONTH FROM
> datein)=1
Rewrite it as
SELECT * FROM MYTABLE WHERE datein between date '2019-01-01' and date '2019-02-01'
Then you can create an ordinary index for datein.
--
WBR, SD.
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Visit http://www.firebirdsql.org and click the Documentation item
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> I want to create a index to improve a query like that:
> SELECT * FROM MYTABLE WHERE EXTRACT(YEAR FROM datein)=2019 AND EXTRACT(MONTH FROM
> datein)=1
Rewrite it as
SELECT * FROM MYTABLE WHERE datein between date '2019-01-01' and date '2019-02-01'
Then you can create an ordinary index for datein.
--
WBR, SD.
------------------------------------
------------------------------------
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Visit http://www.firebirdsql.org and click the Documentation item
on the main (top) menu. Try FAQ and other links from the left-side menu there.
Also search the knowledgebases at http://www.ibphoenix.com/resources/documents/
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
------------------------------------
Yahoo Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/firebird-support/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/firebird-support/join
(Yahoo! ID required)
<*> To change settings via email:
firebird-support-digest@yahoogroups.com
firebird-support-fullfeatured@yahoogroups.com
<*> To unsubscribe from this group, send an email to:
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<*> Your use of Yahoo Groups is subject to:
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