Vitalii Tymchyshyn wrote:
> 23.03.11 12:10, Adarsh Sharma ???????(??):
>> I just want to retrieve that id 's from page_content which do not
>> have any entry in clause2 table.
>>
> Then
> select distinct(p.crawled_page_id) from page_content p
> where NOT EXISTS (select 1 from clause2 c where c.source_id =
> p.crawled_page_id);
> is correct query.
>
I can't understand how* select 1 from clause2 c where c.source_id =
p.crawled_page_id works too, *i get my output .
What is the significance of 1 here.
Thanks , Adarsh
**
> Best regards, Vitalii Tymchyshyn.