Re: 3 value logic. Why is SQL so special?

You should read the thread with the subject: "So what's null then if it's not nothing?"

-- 
frosty

Karen Hill wrote:


> X-No-Archive:yes


>

> I know that visual basic, lisp, python, c  , c++ , perl, all have 2

> value logic.  What makes SQL so special that it needs 3vl when all

> these langauges make do with 2vl?

>

> I read a book on SQL which was authored by Date before I knew of the

> whole Date controversy and when I was learning SQL.  I was thoroughly

> confused when he went on a spiel about nulls.  I echoed this sentiment

> at work and was chastized and told that Date is a kook.  Yet I have

> some time later accepted nulls and work with them just fine.  In the

> back of my mind though, coming from a C++ background I still feel that

> if c++ can make it on 2vl why not SQL?

>

> Why do nulls make us feel so strange?