Re: Count of rows

From: "Christian Kindler" <christian(dot)kindler(at)gmx(dot)net>
To: pgsql-sql(at)postgresql(dot)org
Subject: Re: Count of rows
Date: 2007-08-03 07:20:45
Message-ID: 20070803072045.152170@gmx.net
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do this via execute in a stored procedure - something like this (written on the flow - untested!)

returns setof text

declare
my_record record;
my counter as bigint;

begin

for my_record in
select tablename from pg_tables where
schemaname = 'public'
loop
execute into counter
'select count(*) from ' || my_record.tablename ;
return next my_record.tablename || ': ' || counter::text;

end loop;
return null;

end;

On Fri, August 3, 2007 7:35 am, Paul Lambert wrote:
> What's the best way to count how many rows are in each table via SQL? Or
> is it even possible?
>
> I'm trying something like:
>
> select tablename, count(*) from (select tablename from pg_tables where
> schemaname = 'public') as test group by tablename;
>
> But obviously this just gives a count of 1 for each table in the public
> schema.
>
> Can it be done or would I have to write a function?
>
> --
> Paul Lambert
> Database Administrator
> AutoLedgers
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