RE: Date comparison question

Because the column run_date is apparently of date datatype.

The query that doesn't work looks like it compares a date datatype to a character datatype which won't evaluate as a match.

The other two situations compare a character datatype to a character datatype, which can evaluate as a match.

Michael Armstead
Database Administrator, OCP-Certified
Corporate & Finance Information Systems
Glaxo SmithKline

> -----Original Message-----
> From: Lisa Yates [SMTP:cosnit_at_creighton.edu]
> Sent: Monday, January 08, 2001 2:27 PM
> To: Multiple recipients of list ORACLE-L
> Subject: Date comparison question
>
>
> Why doesn't this query ever return...
>
> where run_date = to_date('01-03-2001 16:34:59','mm-dd-yyyy hh24:mi:ss')
>
> but this query does....
>
> where to_char(run_date) = to_char(to_date('01-03-2001
> 16:34:59','mm-dd-yyyy hh24:mi:ss'))
>
> and so does this query....
>
> where to_char(run_date,'mm-dd-yyyy hh24:mi:ss') = '01-03-2001 16:34:59'
>
> ?
>
> TIA
>
> Lisa
>
>
> ********************************************
> * Lisa Yates cosnit_at_creighton.edu *
> * Creighton University *
> * Omaha, Nebraska *
> * (402) 280-2419 fax: (402) 280-2573 *
> * Define the Universe, give 2 examples. *
> ********************************************
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Received on Mon Jan 08 2001 - 13:54:36 CST