Re: doDelete without a primary key

[Gene Wadleigh]

The primary key of the relation is a composite of the primary keys of the joined 
entities.

create table r (a integer not null references a,b integer not null references b,primary
key(a,b))

Travis Low wrote:

>
> If a table represents a mapping between two primary keys in other tables, should it 
>have a
> separate field as a primary key?

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