)
Then you can join calls to phonenumbers on full number string then join
countries on country prefix...
Kind Regards,
Misa
Sent from my Windows Phone From: Mario Splivalo
Sent: 10 December 2011 23:27
To: pgsql-sql@postgresql.org
Subject: [SQL] Subselects to Joins? Or: how to design phone calls
Hi Mario,
over - partition by will help. Iy that syntax is uncomfortable you can use
multiple joins, using maximum length or max(prefix::int) but that will slow
down the process. select over - partition by is fastest solution i think.
On Sat, Dec 10, 2011 at 11:24 PM, Mario Splivalo
wrote:
> I
I have a table called 'calls' which holds 'call detail records'. Let's
assume the table looks like this:
CREATE TABLE cdr (
call_id serial,
phone_number text
);
And I have a table with country call prefixes, that looks like this:
CREATE TABLE prefixes (
prefix text,
