Re: SELECT substring with regex

On 7/7/06, Rodrigo De Leon <rdeleonp(at)gmail(dot)com> wrote:
>
> On 7/7/06, T E Schmitz <mailreg(at)numerixtechnology(dot)de> wrote:
> > But that takes me to the next problem:
> >
> > For the sake of the example I simplified the regular pattern.
> > In reality, BASE_NAME might be:
> >
> > 28mm
> > 28-70mm
> >
> > So the reg. expr. requires brackets:
> >
> > substring (NAME, '^(\\d+(-\\d+)?mm)' ) as BASE_NAME
> >
> > Actually, the pattern is more complex than that and I cannot see how I
> > can express it without brackets.
>
> Maybe:
>
> select
> substring ('150mm LD AD Asp XR Macro', '^[\\d-]*mm' ) as BASE_NAME
> , substring('150mm LD AD Asp XR Macro','^[\\d-]*mm (.*)$') as SUFFIX;
>
> select
> substring ('28-70mm LD AD Asp XR Macro', '^[\\d-]*mm' ) as BASE_NAME
> , substring('28-70mm LD AD Asp XR Macro','^[\\d-]*mm (.*)$') as SUFFIX;
>
> etc...
>
> Regards,
>
> Rodrigo

Is there a reason this column wasn't separated into two different columns?
Or perhaps into a child table if there could be more than one XXXmm value in
the field?

Just curious.

-Aaron