how can I let DATEFORMAT by default

SET DATEFORMAT change format of datetime in query
I need to let datetime format in YMD by default
How can I get it?
ThansThe language setting determines the default value for the DATEFORMAT. To
display the default setting for each language issue the following command:
sp_helplanguage
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"parodrig" <parodrig@.discussions.microsoft.com> wrote in message
news:A9A1C085-FB65-4380-A6FC-DCDB7B1529F8@.microsoft.com...
> SET DATEFORMAT change format of datetime in query
> I need to let datetime format in YMD by default
> How can I get it?
> Thans