Hi,
I encountered a problem with a DISTINCT query (mySQL-3.23.42). I need to
order by a field not contained in the field set of the SELECT clause. The
following query works correctly:
SELECT DISTINCT
p.lastchanged AS lastchanged,
p.dam_id AS dam_id,
d.dam AS dam,
d.sire1 AS sire1,
d.dam1 AS dam1,
d.year AS year
FROM
products p
LEFT JOIN
dams d
ON
(p.dam_id=d.dam_id)
WHERE
p.lastchanged>='$s_from_date' AND
p.active='Y'
ORDER BY
p.lastchanged DESC,
d.dam ASC
However I don't want to sort by "lastchanged", but by "changed" instead,
which has a different meaning than lastchanged in my tables. But now every
row shows up several hundred times, instead of being DISTINCTed.
SELECT DISTINCT
p.lastchanged AS lastchanged,
p.dam_id AS dam_id,
d.dam AS dam,
d.sire1 AS sire1,
d.dam1 AS dam1,
d.year AS year
FROM
products p
LEFT JOIN
dams d
ON
(p.dam_id=d.dam_id)
WHERE
p.lastchanged>='$s_from_date' AND
p.active='Y'
ORDER BY
p.changed DESC,
d.dam ASC
Any idea how I can get this sorted by changed, but correctly DISTINCTed?
Regards
... Ralph ...
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