> > You need to do this on the mysql side, not in php - php can't
> > summarize the data before processing it, so you need to use
> > something like the date() function in mysql on your timestamp column.
> > http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html#function_date
> > without knowing your original query it's hard to give an example, but:
> > select distinct date(timestamp_column) from table;
> Thanks Chris,
> I am getting closer, but so far it is not iterating only once per
> unique 'date part of the datetime expression', it is returning all the
> rows in the table, including those with the very same date but
> different time in the value of the 'solarLandingDateTime' column.
> There is not alot of discussion in the mysql docs that I saw about how
> to work with DISTINCT. I need to grab data out of the 3 columns:
> solarLandingIP, solarLandingDir, solarLandingDateTime (this part of
> my SELECT is working).
> This is what I have:
> $foundTrackingRows=mysql_query("SELECT DISTINCT
> DATE(solarLandingDateTime) solarLandingIP, solarLandingDir,
> solarLandingDateTime FROM ".$whichTable." ORDER BY
> solarLandingDateTime DESC LIMIT $Maxrecs2Show") or die("query failed:
> " .mysql_error());
There is no comma between DATE(solarLandingDateTime) and solarLandingIP
which means the DATE column will use the alias 'solarLandingIP'. Is this
your intention? Or is the solarLandingIP another column from the table.
If the latter, you may want to do something like this:
DATE(solarLandingDateTime) AS solarLandingDate,
solarLandingIP, solarLandingDir, solarLandingDateTime
" ORDER BY solarLandingDateTime DESC
LIMIT $Maxrecs2Show") or die("query failed: " . mysql_error());>
If you are aliasing a column it is better to use the optional AS keyword
to avoid confusion.
MySQL's DATE function returns dates formatted as 'YYYY-MM-DD' so DATE_FORMAT
is not needed here.
niel.archer (at) blueyonder.co.uk
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