From: Osvaldo Kussama <osvaldo.kussama@gmail.com>
To: Gavin McCullagh <gavin.mccullagh@gcd.ie>
Cc: Frank Bax <fbax@sympatico.ca>
Cc: pgsql-sql@postgresql.org
Subject: Re: extracting from epoch values in pgsql
Date: Thu, 17 Sep 2009 14:32:29 -0300
Message-ID: <690707f60909171032q4ba19ef8y30e31c7f7ca0a0b0@mail.gmail.com> (raw)
In-Reply-To: <20090917173039.GV16815@gcd.ie>
References: <20090917164439.GU16815@gcd.ie>
<4AB26B6F.4010207@sympatico.ca>
<20090917173039.GV16815@gcd.ie>
2009/9/17 Gavin McCullagh <gavin.mccullagh@gcd.ie>:
> On Thu, 17 Sep 2009, Frank Bax wrote:
>
>> Gavin McCullagh wrote:
>>> SELECT time, to_timestamp(time) AS ts,
>>> EXTRACT('months',to_timestamp(time)) FROM mdl_log;
>>> ERROR: syntax error at or near ","
>>> LINE 1: ...t time, to_timestamp(time) AS ts, extract('months',to_times...
>>
>> Try replacing extract('month',value) with extract('months' from value)
>
> Makes no difference whether month or months:
>
> moodle-01-01-2009=# select time, to_timestamp(time) AS ts, extract('month','to_timestamp(time)') from mdl_log LIMIT 10;
> ERROR: syntax error at or near ","
> LINE 1: ...ct time, to_timestamp(time) AS ts, extract('month','to_times...
> ^
> moodle-01-01-2009=# select time, to_timestamp(time) AS ts, extract('months','to_timestamp(time)') from mdl_log LIMIT 10;
> ERROR: syntax error at or near ","
> LINE 1: ...t time, to_timestamp(time) AS ts, extract('months','to_times...
> ^
From manual:
http://www.postgresql.org/docs/current/interactive/functions-datetime.html
date_part('month',to_timestamp(time))
or
extract(month from to_timestamp(time))
Osvaldo
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To: pgsql-sql@postgresql.org
Cc: osvaldo.kussama@gmail.com, gavin.mccullagh@gcd.ie, fbax@sympatico.ca
Subject: Re: extracting from epoch values in pgsql
In-Reply-To: <690707f60909171032q4ba19ef8y30e31c7f7ca0a0b0@mail.gmail.com>
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