Re: SQL syntax rowcount value as an extra column in the result set

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(at)harris(dot)com>
To: <pgsql-sql(at)postgresql(dot)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(at)postgresql(dot)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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