Re: Help! SQL example needed for date comparison!

Gilbert R. Payson wrote:
}
} An example for sybase would be:
}
} select * from telephone_book where datediff(dd,my_datetime,getdate()) = 1
}
} : >ah262_at_detroit.freenet.org wrote:
} : >>
} : >> I am in urgent need of some SQL sample code that takes a database
} : >> DATETIME formatted field and compares it to the system date (minus one
} : >> day) for equality. I am, in effect, attempting to pull the records from
} : >> a table dated 1 day previous from the current system date. Sounds
} : >> simple, eh? I've looked at using the various date functions that Informix
} : >> provides, but each one is very specialized in the resulting value it
} : >> produces.
} : >
} : >I do not understand:
} : > select * from table
} : > where table.datecolumn=today-1
} : >does not work ?

if table T1 has column COL1 defined as datetime year to second then

select * from t1
where date(col1) = TODAY - 1

should do what you are looking for

} : >
} : >Michal
} : >
} : >--
} : >--------------------------------------------------------------
} : >Michal Hajek mailto:hajek_at_nspuh.cz
} : >Sprava NIS http://www.nspuh.cz
} : >NsP Uherske Hradiste phone : voice +420 0632 529 204
} : >Purkynova 365 fax +420 0632 551 014
} : >686 68 Uherske Hradiste Czech Republic
} : >--------------------------------------------------------------
}
} --
} **************************************************************************
} Gil Payson
} gil_at_gilbaby.dinoco.de
} g.payson_at_edina.xnc.com
} grp_at_geac.com
} **************************************************************************

Tino Received on Fri Dec 12 1997 - 00:00:00 CET