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Re: select problem

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On 06/25/2014 07:19 PM, Onno Dreischor wrote:
> I have made a small MySQL-database about persons figuring in a series of 
> little stories. The structure is, given as TABLE(field1,field2):
> PERSON (pid, name)
> STORY (sid, title)
> LOCALISATION (lid, pid, sid).
> Now I'm trying to write a query giving the stories where two given 
> persons appear.

I assume that the persons should appear in the same story. One way is to
use a join:

select a.sid
from LOCALISATION a
join LOCALISATION b
    on a.sid = b.sid
where a.pid = ?
and b.pid = ?;

> Somehow I feel that this is rather easy, but in a way 
> I'm blind for that. As I see it the problem is in fact having two 
> variables in the same table.

I'm not sure what you mean, can you elaborate?


/Lennart

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select problem Onno Dreischor <onno@ongeldig.nl> - 2014-06-25 19:19 +0200
  Re: select problem Lennart Jonsson <erik.lennart.jonsson@gmail.com> - 2014-06-25 19:53 +0200
    Re: select problem Onno Dreischor <onno@ongeldig.nl> - 2014-06-25 23:02 +0200
    Re: select problem Onno Dreischor <onno@ongeldig.nl> - 2014-06-25 23:06 +0200
      Re: select problem Geoff Muldoon <geoff.muldoon@invalid.invalid> - 2014-06-26 09:18 +1000
        Re: select problem Denis McMahon <denismfmcmahon@gmail.com> - 2014-06-26 00:48 +0000
          Re: select problem Geoff Muldoon <geoff.muldoon@invalid.invalid> - 2014-06-26 11:11 +1000
          Re: select problem Jerry Stuckle <jstucklex@attglobal.net> - 2014-06-25 22:50 -0400
            Re: select problem Denis McMahon <denismfmcmahon@gmail.com> - 2014-06-26 06:52 +0000
              Re: select problem gordonb.dfadr@burditt.org (Gordon Burditt) - 2014-06-26 04:41 -0500
                Re: select problem Doug Miller <doug_at_milmac_dot_com@example.com> - 2014-06-26 11:09 +0000
                Re: select problem Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-27 11:01 +0200
  Re: select problem Denis McMahon <denismfmcmahon@gmail.com> - 2014-06-25 21:45 +0000
  Re: select problem Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-27 09:00 +0200
    Re: select problem Onno Dreischor <onno@ongeldig.nl> - 2014-06-27 20:06 +0200
      Re: select problem Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-06-27 23:03 +0200
        Re: select problem "Erick T. Barkhuis" <erick.use-net@ardane.c.o.m> - 2014-06-28 13:00 +0000
      Re: select problem Jerry Stuckle <jstucklex@attglobal.net> - 2014-06-28 22:36 -0400

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