and take a look at
inet_ntoa and inet_aton
you may store IP addresses as integers and the query will be
SELECT inet_aton(inetAdr), * FROM Client WHERE inetAdr <
inet_aton('240.0.0.0') OR inetAdr>inet_aton('188.8.131.52')
the inet_aton will return the IP dotted.
As well, you do not need to use HAVING here.
Hope this helps.
----- Original Message -----
From: "Jonathan Arnold" <jdarnold@stripped>
Sent: Wednesday, March 05, 2003 6:17 PM
Subject: HAVING vs. WHERE
> In the MySQL reference, it warns against using HAVING for items
> that "should" be in a WHERE clause. I'm not sure what items
> "should" be in a WHERE clause.
> My exact problem is I want to select some records that have a
> dotted IP address as one of the fields. And I want to filter out
> the multicast addresses, which are the addresses that begin with
> the numbers in the range of 224. thru 239. This does it:
> SELECT * FROM Client WHERE left(inetAdr,instr(inetAdr,"."))< 224
> OR left(inetAdr,instr(inetAdr,".")) > 239
> and this works as well:
> SELECT *,left(inetAdr,instr(inetAdr,".")) as ia FROM Client HAVING ia <
> OR ia > 239
> and it is a little cleaner, although as I'm going to be doing this in a
> PHP script, cleanliness isn't all that important.
> So I guess I have 2 questions:
> 1] Which should I use?
> 2] Is this the easiest way to check for the multicast address?
> Jonathan Arnold (mailto:jdarnold@stripped)
> Amazing Developments http://www.buddydog.org
> It ain't what you don't know that gets you into trouble.
> It's what you know for sure that just ain't so. Mark Twain
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