combining multiple rows into one

[satre]

Hi,

I'm sure this is simple, but it's eluding me as many things do as a newbie. Anyway, I've been having trouble in my PHP code so I'm trying to at least get the right MySQL query, and this works for the info I need:

SELECT artist.id, medium FROM artist, medium, artistmedium WHERE artist.id=medartid AND medium.id=mediumid

and it gives me a very nice table with artist id #s on the left, and the medium they work in on the right. When one artist works in more than one medium, then they have more than one row like so:

ID medium
-- ----------
1 | painting
2 | sculpture
2 | computer web/based
3 | ceramics
4 | painting
4 | drawing
4 | installation
.
.
.
and so on.

What I would like to have is something like this:
ID medium
-- ----------
1 | painting
2 | sculpture, computer web/based
3 | ceramics
4 | painting, drawing, installation
.
.
.

How can I do this?

Thanks,
Satre

[pompopom]

This is more an SQL question rather then PHP

look at the MySQL section and ask for a JOIN query...

I'm not to good at these myself, otherwise I would have given you the correct query instead

succes

[r937]

select artist.id
     , group_concat(medium.medium) as media
  from artist
inner
  join artistmedium 
    on artistmedium.medartid = artist.id
inner
  join medium
    on medium.id=artistmedium.mediumid
group
    by artist.id

[satre]

Thanks r937

I tried that, and got an error (I had actually tried the GROUP_CONCAT command before and got an error too)

#1064 - You have an error in your SQL syntax.**Check the manual that corresponds to your MySQL server version for the right syntax to use near '(medium.medium) AS media FROM artist INNER JOIN artistmedium ON

[satre]

Hi,

I'm sure this is simple, but it's eluding me as many things do as a newbie. Anyway, I've been having trouble in my PHP code so I'm trying to at least get the right MySQL query, and this works for the info I need:

SELECT artist.id, medium FROM artist, medium, artistmedium WHERE artist.id=medartid AND medium.id=mediumid

and it gives me a very nice table with artist id #s on the left, and the medium they work in on the right. When one artist works in more than one medium, then they have more than one row like so:

ID medium
-- ----------
1 | painting
2 | sculpture
2 | computer web/based
3 | ceramics
4 | painting
4 | drawing
4 | installation
.
.
.
and so on.

What I would like to have is something like this:
ID medium
-- ----------
1 | painting
2 | sculpture, computer web/based
3 | ceramics
4 | painting, drawing, installation
.
.
.

How can I do this?

Thanks,
Satre

[longneck]

requires mysql 4.1 or newer:

SELECT artist.id
     , group_concat(medium)
  FROM artist
     , medium
     , artistmedium
 WHERE artist.id=medartid
   AND medium.id=mediumid
GROUP
     BY artist.id

[r937]

well, it doesn't like your GROUP_CONCAT, which was introduced in version 4.1

your choices: upgrade from the grandfather version you're on, to at least the father version (4.1) -- the current version is 5.0 -- or alternatively, collapse multiple rows for each artist into one row using php

[r937]

sorry, longneck, as you can see, there was a cross-post here, and i've merged two threads

well, not exactly a cross-post, since satre originally posted in the php forum and was advised to try the mysql forum

for future reference, folks, we move threads, we don't start identical new ones -- precisely for this reason, so that people do not spend time answering a thread that was already answered elsewhere

[longneck]

ack. i was wondering what was going on here.