From: Jayadevan M <Jayadevan.Maymala@ibsplc.com>
To: Snyder, James <jsnyde07@harris.com>
Cc: pgsql-sql@postgresql.org
Cc: pgsql-sql-owner@postgresql.org
Subject: Re: SQL syntax rowcount value as an extra column in the result set
Date: Fri, 26 Mar 2010 09:05:00 +0530
Message-ID: <OF5A2D0504.FE37F1EE-ON652576F2.00139075-652576F2.00138CC0@LocalDomain> (raw)
In-Reply-To: <594D625E4784AD4EA9D423E292BE6725489FD1@mlbe2k10.cs.myharris.net>
References: <594D625E4784AD4EA9D423E292BE6725489FD1@mlbe2k10.cs.myharris.net>
Hi,
Is this what you are trying to do?
postgres=# select * from (select count(*) from people ) p, (select
firstname from people)p2;
count | firstname
-------+-----------
5 | Mary
5 | Mary
5 | John
5 | John
5 | Jacob
(5 rows)
I do not know about the performance impact of such a query (cartesian
join)
Regards,
Jayadevan
From: "Snyder, James" <jsnyde07@harris.com>
To: <pgsql-sql@postgresql.org>
Date: 26/03/2010 03:21
Subject: [SQL] SQL syntax rowcount value as an extra column in the
result set
Sent by: pgsql-sql-owner@postgresql.org
Hello
I’m using PostgreSQL (8.4.701) and Java (jdbc,
postgresql-8.4-701.jdbc4.jar) to connect to the database.
My question is: what is the SQL syntax for PostgreSQL to achieve the
following:
I want to receive the rowcount along with the rest of a result set. For
example, let’s say the following query returns
select first_name from people;
first_name
=========
Mary
Sue
Joe
and the following query returns the value
select count(*)as ROWCOUNT from people;
ROWCOUNT
==========
3
3
What I’m looking for is the output as
ROWCOUNT , first_name
=====================
3 , Mary
3 , Sue
3 , Joe
so I can use JDBC (snip-it) as follows:
resultSet.getInt(“ROWCOUNT”)
resultSet.getString(“first_name”)
On a side note, Oracle allows the following syntax to achieve the above:
select count(*) over () as ROWCOUNT , first_name from people
Thanks,Jim
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To: pgsql-sql@postgresql.org
Cc: Jayadevan.Maymala@ibsplc.com, jsnyde07@harris.com, pgsql-sql-owner@postgresql.org
Subject: Re: SQL syntax rowcount value as an extra column in the result set
In-Reply-To: <OF5A2D0504.FE37F1EE-ON652576F2.00139075-652576F2.00138CC0@LocalDomain>
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