Re: Comparing dates in DDL

On Fri, 4 Jan 2019, David G. Johnston wrote:

>>   I wondered about this since NULL can be missing, unknown, or otherwise
>> defined. Are there benefits to allowing an empty value in that column when
>> checking that it's later than the start date rather than explicitly setting
>> a default date after the start date?
>>
>>
> I don’t understand the question...

David,

   Understandable. :-)

   Perhaps this is more clear: is there a difference between not specifying a
default end_date value and specifying NULL as the default end_date value?

Regards,

Rich