Date field sorts with Null values

We have small oracle database which is used for third party application/driver. Several tables have date type fields and somehow this driver converts null value into 01/01/0001 in some cases. However when we do select * from table order by date_field it does not look like it separates Nulls from this 01/01/0001 It kind treats this as NULL.
Just want to hear if anybody had similar issues or this is normal for Oracle?
Oracle Version: 10.2.0.3

No, in the rdbms a null is a null so if a date column value is null it is handled as null. What an application or driver does is another issue. It is however possible via OCI to insert invalid date values into a date column so determining if there is invalid data in the columns is the first step I would take. That way you know if you have a data issue or a driver issue.
HTH -- Mark D Powell --

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Hi to all,
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Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
MS SQL optimization: MS SQL Development and Optimization
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============

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Message was edited by:
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