You are right, he was probably talking about FK's. I was just so frustrated about people insisting that using "ID" as the primary key in every table is a "good" idea, I didn't bother to reply previously. I stand firm on my belief that the primary key should be something meaningful and NOT "id" just for the sake of having a unique numeric key.
On Mon, Aug 24, 2015 at 8:39 PM, CaT <c...@zip.com.au> wrote: > On Mon, Aug 24, 2015 at 08:22:17PM -0400, Melvin Davidson wrote: > > On Mon, Aug 24, 2015 at 8:00 PM, Berend Tober <bto...@computer.org> > wrote: > > >> 1) What happens if someone mis-types the account-id? > > >> To correct that, you also need to correct the FK field in > the > > >> other dozen tables. > > > > > > ... ON UPDATE CASCADE ? > > > > I believe he's talking about triggers. > > Huh? Why would you use a trigger when FOREIGN KEY has ON UPDATE CASCADE? > > -- > "A search of his car uncovered pornography, a homemade sex aid, women's > stockings and a Jack Russell terrier." > - > http://www.dailytelegraph.com.au/news/wacky/indeed/story-e6frev20-1111118083480 > -- *Melvin Davidson* I reserve the right to fantasize. Whether or not you wish to share my fantasy is entirely up to you.
