Re: SELECT substring with regex
От | Aaron Bono |
---|---|
Тема | Re: SELECT substring with regex |
Дата | |
Msg-id | bf05e51c0607071245w3738e109l8128d345f5b06977@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: SELECT substring with regex ("Rodrigo De Leon" <rdeleonp@gmail.com>) |
Ответы |
Re: SELECT substring with regex
|
Список | pgsql-sql |
On 7/7/06, Rodrigo De Leon <rdeleonp@gmail.com> wrote:
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
On 7/7/06, T E Schmitz <mailreg@numerixtechnology.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
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