Donny,
Thanks for your answer.
I tried your example after adding the necessary index and it works as
long as I define a single number not a range (i.e. p_cat.lft = 4).
Will keep working on the range part.
What I am more interested in is the workarounds that can be made to
improve the ORDER BY
Steven,
In your case, you query doesn't even use an index. And you are using an
order by DESC. Now what I would recommend is something like this, change
your query just to test this out.
SELECT p.* FROM p_cat c, p_ad p WHERE p.cat = c.id AND c.lft
BETWEEN 4 AND 5 ORDER BY p.date DESC LIMIT
