Re: Extract text from string

2012-10-13 Thread hsv 
 2012/10/12 17:56 +0100, Neil Tompkins 
Is there such a way in a MySQL query to extract the text "this is a test"
from the following strings as a example

http://www.domain.com/"; class="link">this is a
test
http://www.domain.com/"; title="this is a test"
class="link">link 

Amongst the built-in functions there isn't much; for the former example, if the 
string is "s", this works:
SUBSTRING_INDEX(SUBSTRING_INDEX(s, '>', -3), '<', 1)
; for the latter, if "t":
SUBSTRING_INDEX(SUBSTRING_INDEX(t, '"', -4), '"', 1)
.

If you want a real HTML parser that discards everything but arbitrary strings, 
you have to get & install your own.


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Re: Extract text from string

2012-10-12 Thread Singer Wang 
Of course...

There's many libraries for REGEX which you can use, link it with an UDF and
boom!
http://dev.mysql.com/doc/refman/5.1/en/adding-udf.html

S



On Fri, Oct 12, 2012 at 12:56 PM, Neil Tompkins <
neil.tompk...@googlemail.com> wrote:

> Hi,
>
> Is there such a way in a MySQL query to extract the text "this is a test"
> from the following strings as a example
>
> http://www.domain.com/"; class="link">this is a
> test
> http://www.domain.com/"; title="this is a test"
> class="link">link
>
> Thanks
> Neil
>

RE: Extract text from string

2012-10-12 Thread Rick James 
No.
Or if there is, it is too ugly to contemplate.
You are better off doing such in a real programming language.  MySQL will 
locate row(s) containing "this is a test" via LIKE, RLIKE, or FULLTEXT (with 
caveats).  You need to take over from there.

> -Original Message-
> From: Neil Tompkins [mailto:neil.tompk...@googlemail.com]
> Sent: Friday, October 12, 2012 9:56 AM
> To: [MySQL]
> Subject: Extract text from string
> 
> Hi,
> 
> Is there such a way in a MySQL query to extract the text "this is a
> test"
> from the following strings as a example
> 
> http://www.domain.com/"; class="link">this is a
> test http://www.domain.com/"; title="this
> is a test"
> class="link">link
> 
> Thanks
> Neil

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