From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | Ted Byers <r(dot)ted(dot)byers(at)rogers(dot)com> |
Cc: | Gregory Stark <stark(at)enterprisedb(dot)com>, pgsql-general(at)postgresql(dot)org |
Subject: | Re: Optimal time series sampling. |
Date: | 2007-11-09 17:52:37 |
Message-ID: | 12536.1194630757@sss.pgh.pa.us |
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Lists: | pgsql-general |
Ted Byers <r(dot)ted(dot)byers(at)rogers(dot)com> writes:
> --- Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> Why are you asking this list for help with a MySQL
>> performance problem?
>>
> because my question isn't really about MySQL, but
> rather about how best to construct the SQL required to
> get the job done, regardless of what database is used.
> I have seen some claims that it is better to use
> joins instead of correlated subqueries and others that
> say the opposite.
The problem is that the answer may well be different for different
databases. You'd get better answers about MySQL on a MySQL list
than you'll get here.
regards, tom lane
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