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Re: Set Membership operator -- test group membership

From: "Igor Katrayev" <igor(dot)katrayev(at)nprb(dot)org>
To: <pgsql-general(at)postgresql(dot)org>
Cc: <pgsql-novice(at)postgresql(dot)org>, <pgsql-sql(at)postgresql(dot)org>
Subject: Re: Set Membership operator -- test group membership
Date: 2005-06-14 19:27:30
Message-ID: 67622181058673409D58D1DA2B0457410A6D3D@aoos-nprb-sbs.aoos-nprb.local (view raw or flat)
Thread:
Lists: pgsql-generalpgsql-novicepgsql-sql
Sophie,

The sql like this:
  select * from tbl1 where (a, b) in ((1, 20), (2, 30), (3, 50));
works very well in PostgreSQL 8,

Sincerely,

Igor Katrayev, Data Systems Manager
North Pacific Research Board
1007 West Third Avenue, Suite 100
Anchorage, AK 99501
Phone: 907-644-6700
Fax:   907-644-6780
igor(dot)katrayev(at)nprb(dot)org


-----Original Message-----
From: pgsql-general-owner(at)postgresql(dot)org
[mailto:pgsql-general-owner(at)postgresql(dot)org] On Behalf Of Sophie Yang
Sent: Tuesday, June 14, 2005 11:09 AM
To: pgsql-general(at)postgresql(dot)org
Cc: pgsql-novice(at)postgresql(dot)org; pgsql-sql(at)postgresql(dot)org
Subject: [GENERAL] Set Membership operator -- test group membership

Say I have a table tbl1 with two columns:
   tbl1(a integer, b integer, c integer)

I want to select the rows in which a and b are members of a list of
integer pairs. The SQL in my mind is something like:
  select * from tbl1 where (a, b) in ((1, 20), (2, 30), (3, 50));

I know the SQL above does not work in PostgreSQL. I wonder what is the
proper way to use in PostgreSQL. I tried "select * from tbl1 where (a,
b) in ('{{1, 20}, {2, 30}, {3, 50}}')", and it doesn't work either.

Thanks!
Sophie


		
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