Re: Why relational division is so uncommon?

On Apr 26, 3:22 pm, "V.J. Kumar" <vjkm...@xxxxxxxxx> wrote:
Vadim Tropashko <vadimtro_inva...@xxxxxxxxx> wrote innews:1177607284.813162.87940@xxxxxxxxxxxxxxxxxxxxxxxxxxxx:

This is an interesting observation as well. Consider a medical
database schema:

PatientSymptom (
name string,
symptom string
)

'Symptom
string' is an ugly hack to emulate relational division for the original
table you've specified below.

I think the misunderstanding here is the "string" which is a datatype.
I should have written "varchar2(100)". Ugly but not ambiguous.

.

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