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.Elphick@lfix.co.uk
Isle of Wight                              http://www.lfix.co.uk/oliver
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