From: Raj Mathur <raju@linux-delhi.org>
To: pgsql-sql@postgresql.org
Subject: Re: Substring
Date: Sat, 5 Sep 2009 08:02:09 +0530
Message-ID: <200909050802.10371.raju@linux-delhi.org> (raw)
In-Reply-To: <15318.85292.qm@web53905.mail.re2.yahoo.com>
References: <15318.85292.qm@web53905.mail.re2.yahoo.com>
On Saturday 05 Sep 2009, bilal ghayyad wrote:
> I have an sql script function that take one text parameter "funct
> (text)", what I need to do is the following:
>
> If the parameter name is string and its value was for example "abcd"
> then I need to do a query based on ab and then based on the abc, how?
>
> Example:
>
> SELECT * from voipdb where prefix like string
>
> But I need the string to be ab and then to be abc? How I can assign
> the string to the first character and then to the first and second?
> In other words, how can I can take part of the string to do query on
> it?
From your example the following brute-force method should work (not
tested):
select * from voipdb where prefix like substring(string from 1 for 2) ||
'%' or prefix like substring(string from 1 for 3) || '%';
However, I don't understand why you'd want to search for both 'ab' and
'abc' in the same query, since the first condition is a superset of the
second one.
Regards,
-- Raju
--
Raj Mathur raju@kandalaya.org http://kandalaya.org/
GPG: 78D4 FC67 367F 40E2 0DD5 0FEF C968 D0EF CC68 D17F
PsyTrance & Chill: http://schizoid.in/ || It is the mind that moves
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To: pgsql-sql@postgresql.org
Cc: raju@linux-delhi.org
Subject: Re: Substring
In-Reply-To: <200909050802.10371.raju@linux-delhi.org>
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