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Home -> Community -> Usenet -> comp.databases.theory -> Re: Does Codd's view of a relational database differ from that ofDate&Darwin? [M.Gittens]

Re: Does Codd's view of a relational database differ from that ofDate&Darwin? [M.Gittens]

From: paul c <toledobythesea_at_oohay.ac>
Date: Mon, 06 Jun 2005 16:58:13 GMT
Message-ID: <Fg%oe.1587417$8l.1545211@pd7tw1no> 





Alexandr Savinov wrote:


> paul c schrieb:

> 


>> Alexandr Savinov wrote:
>>
>>>  
>>> ... If something disappears, if something is deleted then acutally we 
>>> get null.
>>
>>
>>
>> i think we get 'false', according to the CWA.




> 

> 

> Actually it is one and the same, i.e., null, false, empty set 

> ...




if they are one and the same then we don't need nulls.  we already have 
boolean true and false.



p
Received on Mon Jun 06 2005 - 11:58:13 CDT












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