From: Achilleus Mantzios <achill@matrix.gatewaynet.com>
To: Sill-II, Stephen <Stephen.Sill-II@ost.dot.gov>
Cc: pgsql-sql@postgresql.org
Subject: Re: look for latest user login in one table from a list of
Date: Fri, 14 Mar 2003 19:14:44 -0200 (GMT+2)
Message-ID: <Pine.LNX.4.44.0303141913290.8463-100000@matrix.gatewaynet.com> (raw)
In-Reply-To: <4BAE87828F06EB45B2641B83D370350F4663@ostex002.ad.ost.dot.gov>
On Fri, 14 Mar 2003, Sill-II, Stephen wrote:
> I'm trying to come up with an efficient way to do the following task, but I
> haven't found the correct join syntax to do it.
>
> I have table "users" for keeping a list of users I need to check logins for.
> It contains the following fields:
>
> id,Full-Name,User-Name
>
> I have table called "logs" that contains the actual radius log data. The
> three fields I am concerned with are:
>
> User-Name,Date,Time
>
> I have gotten thus far almost what I want with the following query.
>
> SELECT users."User-Name",max(logs."Date") as login_date,max(logs."Time") as
> login_time FROM logs where logs."User-Name"=users."User-Name" GROUP BY
> users."User-Name";
Try
foo=# SELECT users.name,someq.mlast from users left outer join (select
id,max(last) as mlast from log group by id) as someq using(id);
substituting with your names.
>
> This gives me the User-Name, date, and time of people WHO HAVE LOGGED IN.
> I'm looking to have a query that returns all of the users in the first
> table, including those who have not logged in. I have an external perl
> script that generates a nice html report for the manager. I have a script
> that parses the raw .csv files, but I'm trying to move it entirely to
> postgres, including if possible stored-procedures in plperl. I already have
> a perl script that imports the raw log files into the logs table.
>
> Am I on the right track?
>
> Thanks,
>
> Stephen Sill II
>
>
>
> ---------------------------(end of broadcast)---------------------------
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>
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>
--
==================================================================
Achilleus Mantzios
S/W Engineer
IT dept
Dynacom Tankers Mngmt
Nikis 4, Glyfada
Athens 16610
Greece
tel: +30-210-8981112
fax: +30-210-8981877
email: achill@matrix.gatewaynet.com
mantzios@softlab.ece.ntua.gr
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To: pgsql-sql@postgresql.org
Cc: achill@matrix.gatewaynet.com, Stephen.Sill-II@ost.dot.gov
Subject: Re: look for latest user login in one table from a list of
In-Reply-To: <Pine.LNX.4.44.0303141913290.8463-100000@matrix.gatewaynet.com>
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