Michael Glaesemann wrote:
>
> On Dec 24, 2007, at 22:03 , fdu.xiaojf@gmail.com wrote:
>
>> I have googled and currently the only way I can find is do query first
>> and then update or insert.
>
> Or alternatively, UPDATE and see if you've affected any rows. If not,
> insert.
>
> Michael Glaesemann
> grzm seespotcode net
>
>
>

Thanks for your quick reply!

Is the update and insert method quick?

I have tried the query and update/insert way, and it was very slow when more
than 1 million records have been inserted. (I have more than 20 million
records to insert.)

Thanks again!

Xiao Jianfeng

---------------------------(end of broadcast)---------------------------
TIP 3: Have you checked our extensive FAQ?

http://www.postgresql.org/docs/faq