Re: Help on phrasee matching in WHERE (colum~*'.*ab*.')

Gabor Szilagyi wrote:
>I am trying to pick out rows from the database which contains a
>particular string.
>
>I am using the following
>
>SELECT * FROM in_table WHERE n_from ~* '.*nb*.
>
>(Well actually a bunch of this condition is AND/OR -ed together)
>
>My trouble is this: If I enter only a two character string as above,
>it will not only matches string containing "nb" but all those which
>contains the letter "n".

I think you are slightly confused about how pattern-matching works.

Your pattern match says "0-many characters followed by `n' followed by
0-many `b's". That is why `n' alone matches it.

If you simply want any string containing `nb' (case-insensitive)
use "n_from ~* 'nb'". You don't have to say anything at all about
the parts of the string you are not interested in.

--
Oliver Elphick Oliver(dot)Elphick(at)lfix(dot)co(dot)uk
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