Re: "left join" not working?

> where p.id_line=1

this filters rows after join was applied. Try this

select c.id_currency,max(p.modified_on) from currency c left join 
price_line p using (id_currency) where (p.id_line=1 or p.id_line is null) group by 
c.id_currency; 


> Hi, 
> This query: 
> select c.id_currency,max(p.modified_on) from currency c left join 
> price_line p using (id_currency) where p.id_line=1 group by 
> c.id_currency; 
> doesn't list all c.id_currency's, only those with a price_line. However 
> this one does: 
> select c.id_currency,max(p.modified_on) from currency c left join 
> price_line p on (p.id_currency = c.id_currency and p.id_line=1) group by 
> c.id_currency; 
> How come? 
> Thanks, 
> -- 
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