Re: Enforce primary key on every table during dev?

>Adding a surrogate key to such a table just adds overhead, although that could be useful 
>in case specific rows need updating or deleting without also modifying the other rows with 
>that same data - normally, only insertions and selections happen on such tables though, 
>and updates or deletes are absolutely forbidden - corrections happen by inserting rows with 
>an opposite transaction.

I routinely add surrogate keys like serial col to a table already having a nice candidate keys
to make it easy to join tables.  SQL starts looking ungainly when you have a 3 col primary
key and need to join it with child tables.