Thomas SMETS writes: > <snip> > ISBN's have a checkdigit; it would be sensible to provide a > function to be used in a CHECK constraint to ensure that the > ISBN is valid. > </snip> > > OK I'll start searching for it but haven't implemented yet In the PostgreSQL distribution there's a directory contrib/isbn_issn that defines a couple of data types that might help you. -- Peter Eisentraut [EMAIL PROTECTED] http://yi.org/peter-e/
- [SQL] Looking for comments Thomas SMETS
- Re: [SQL] Looking for comments Thomas SMETS
- Re: [SQL] Looking for comments Thomas SMETS
- Re: [SQL] Looking for comments Ron Peterson
- Peter Eisentraut