[GENERAL] Character conversion...

[FC]

I have all my database encoded in ISO-8859-1 and I would like to  
convert this database in UNICODE.


I have try this but with no success.

pg_dump dbase  foo.db
createdb -E UNICODE dbase
psql dbase  foo.db

I have also try to modify the value of client_encoding in the foo.db  
file but that didn't fix my problem.


Thanks.
Fred


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[GENERAL] SQL question.

[FC]

Hello SQL Aces !

I want to do a select on a table distinct on linkid and sorted by  
date. I have try this


SELECT DISTINCT ON (linkid) * FROM all_links
  WHERE uid='2' AND DATE_TRUNC('day',read_date) = DATE_TRUNC('day',
TIMESTAMP '2005-06-01') ORDER BY linkid, read_date;

With this request works but the raws are sorted as I want. To have  
the rows sorted by date I have done this using a temporary table and  
that works exactly as I want.


CREATE LOCAL TEMP TABLE temp_links WITHOUT OIDS AS
  SELECT DISTINCT ON (linkid) * FROM all_links
  WHERE uid='2' AND DATE_TRUNC('day',read_date) = DATE_TRUNC('day',
TIMESTAMP '2005-06-01') ORDER BY linkid;

SELECT * from temp_links ORDER BY read_date DESC limit 100

My question is... How can I do the same thing in the more efficient  
way and without using a temporary table. Since I am using PHP and the  
table is not deleted at the end of the program because PHP keeps the  
connection to the database open.


Thanks for any suggestions.
Fred


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Re: [GENERAL] SQL question.

[FC]

I need to remember to keep things simple...

Works fine, thanks.

Fred


On Jun 1, 2005, at 5:20 PM, Jim Buttafuoco wrote:


how about (untested)

select *
from
(
SELECT DISTINCT ON (linkid) *
FROM all_links
WHERE uid='2' AND DATE_TRUNC('day',read_date) = DATE_TRUNC 
('day',TIMESTAMP '2005-06-01')

ORDER BY linkid
) A
ORDER BY read_date DESC limit 100


-- Original Message ---
From: FC [EMAIL PROTECTED]
To: pgsql-general@postgresql.org
Sent: Wed, 1 Jun 2005 16:40:48 +0200
Subject: [GENERAL] SQL question.



Hello SQL Aces !

I want to do a select on a table distinct on linkid and sorted by
date. I have try this

SELECT DISTINCT ON (linkid) * FROM all_links
   WHERE uid='2' AND DATE_TRUNC('day',read_date) = DATE_TRUNC('day',
 TIMESTAMP '2005-06-01') ORDER BY linkid, read_date;

With this request works but the raws are sorted as I want. To have
the rows sorted by date I have done this using a temporary table and
that works exactly as I want.

CREATE LOCAL TEMP TABLE temp_links WITHOUT OIDS AS
   SELECT DISTINCT ON (linkid) * FROM all_links
   WHERE uid='2' AND DATE_TRUNC('day',read_date) = DATE_TRUNC('day',
 TIMESTAMP '2005-06-01') ORDER BY linkid;

SELECT * from temp_links ORDER BY read_date DESC limit 100

My question is... How can I do the same thing in the more efficient
way and without using a temporary table. Since I am using PHP and the
table is not deleted at the end of the program because PHP keeps the
connection to the database open.

Thanks for any suggestions.
Fred

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