> http://www.postgresql.org/docs/8.1/interactive/functions-matching.html
>
> Any of these CHECK expressions should work:
>
> CHECK (alpha_only SIMILAR TO '[A-Za-z]+')
> CHECK (alpha_only ~ '^[A-Za-z]+$')
> CHECK (alpha_only ~* '^[a-z]+$')
>
> Unfortunately, even though SIMILAR TO has been
On Fri, Jul 07, 2006 at 11:34:57PM -0700, Richard Broersma Jr wrote:
> "How do you ensure that a column will have a single alphabetic
> character string in it? (That means no spaces, no numbers, and
> no special characters.)"
You can check patterns with regular expressions. PostgreSQL supports
SI
