Re: (OT) MySQL select Question

[antirice]

I've actually been working on a module to allow you to mimic subselections in mysql. But alas, it's on the backburner right now.

For this particular case, you could actually just use the following:

select distinctrow table1.* from table1,table2 where table1.category=1
+ or (table1.category = table2.id and table2.parent_id = 1);

Hope this helps...and works as it's untested.

antirice    
The first rule of Perl club is - use Perl
The ith rule of Perl club is - follow rule i - 1 for i > 1

[Beatnik]

mysql doesn't do subqueries yet... You better do 2 selects and insert the data from the first into the second one.

Greetz
Beatnik
... I'm belgian but I don't play one on TV.

[antirice]

Umm... I know MySQL doesn't do subselects. In the selection I posted, there aren't any subselections. The module of which I was speaking was so you could actually use SQL-92 style subselections but have them translated into multiple queries which, yes, do create temporary tables. For this particular query, however, there is no need to create a second table.

Updated: Seemed a bit harsh. Just having a bad day :-/

antirice    
The first rule of Perl club is - use Perl
The ith rule of Perl club is - follow rule i - 1 for i > 1

[Anonymous Monk]

Thanks, I can't tell you how long that was taking me to work out. You got it right first time and saved me further hours of work, so thanks again!