RE: nonstandard meaning of "KEY" in MySQL?

2001-11-15 Thread Carsten H. Pedersen
> > From: Bennett Haselton > > > > My databases textbook from college says that specifying an > > attribute as an > > "index" means that the data will be stored in such a way that > > lookups on > > that attribute are faster, and specifying an attribute as a > > "key" means > > that its values hav

RE: nonstandard meaning of "KEY" in MySQL?

2001-11-15 Thread Norman L. Smith
> From: Bennett Haselton > My databases textbook from college says that specifying an When I read my post I saw that I had made at least one obvious error. Please change: "An index is conceptually a container of keys arranged in such a way that each key in the index refers to a unique record.

RE: nonstandard meaning of "KEY" in MySQL?

2001-11-15 Thread Norman L. Smith
> From: Bennett Haselton > > My databases textbook from college says that specifying an > attribute as an > "index" means that the data will be stored in such a way that > lookups on > that attribute are faster, and specifying an attribute as a > "key" means > that its values have to be unique.

RE: nonstandard meaning of "KEY" in MySQL?

2001-11-14 Thread Christopher Book
I don't think that's entirely true. MSAccess doesn't refer to indexes, only keys... and keys in access can be unique or non-unique based on your key properties. This is identical to how MySQL treats the terms. Chris >What are the *standard* meanings of these terms? The usage in the textbook ma