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INSERT multiple rows with a subselect? (PostgreSQL)

Posted on 2002-03-22
3
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Last Modified: 2010-08-05
Ok, I am not sure if it works like this, but it's worth a try.

I have three tables, a hypothetical example with the same relationships would be:

books
-----
book_id
author
whatever

pages
-----
page_id
book_id (referring to a book from the table above)
description
whatever

notes
-----
page_id
comment
user

what I need, is the quickest way, given a book_id a user name and a comment to add a row to the notes table for each page associated with that book_id, with the same comment and user (I know it doesn't make much sense in this example, just trust me, it's what I need)

to help visualize it (let's say we are doing this for book 3, the comment is "good book" and the user name is 'billg'):I

NSERT INTO notes VALUES ((SELECT page_id FROM books WHERE book_id = 3),'good book', 'billg')

now this obviously doesn't work, but if it did, it would create as many rows in notes as there are pages with book_id = 3  and each one would have the same user and comment.

Is there a way to do this in one statement?  (I am hopeful, but doubtful)

Oh, as the title says, I am using postgres

thanks,
Dmitri
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Question by:_D_
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3 Comments
 
LVL 22

Accepted Solution

by:
DrSQL earned 200 total points
ID: 6888721
 D  ,
   You want an insert select:

insert into notes (page_id,comment,user)
  select pageid,'good book','billg' from pages
    where book_id=3;

Good luck!
0
 

Author Comment

by:_D_
ID: 6889151
yep, this is definitely from the "bleeding obvious" department - thanks.
0
 

Expert Comment

by:cyiamxtc
ID: 15072864
You can also do it like this as well....(Oracle 8i):

insert into CR_TNW
(select * from CR_TNWDD);


this is selecting across a link too:

insert into CR_TNW
(select * from PPD.CR_TNW@TRMSP);

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