Re: Extending my question. Was: The relational model and relational algebra - why did SQL become the industry standard?
Date: 13 Feb 2003 14:17:44 +0100
Lauri Pietarinen wrote:
>Jan Hidders wrote:
>>There are two separate questions here:
>>1. Do we want duplicates in the data model, i.e., in the original relations
>> and the results of queries?
>>2. Do we want duplicates in intermediate results?
>>I'm not completely sure what their answer to 1. is but I suspect it is
>>something like "probably not".
>That's not the impression I get from Date's article (see part II), but I
>have not read the book.
- Jan Hidders