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plurals

PO
primarykey
Id
13980161
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
11
CommunityOwnedDate
CreationDate
2012-12-20T20:42:36.520
FavoriteCount
0
LastActivityDate
2012-12-20T23:18:57.180
LastEditDate
2012-12-20T23:18:57.180
LastEditorUserId
833073
OwnerUserId
833073
ParentId
13980078
PostTypeId
2
Score
6
ViewCount
0
LastEditorDisplayName
text
Body
I don't know if there's a better solution, but i think you could use this: <pre><code>SELECT p1.userID, p1.picture as pic1, p2.picture as pic2, p3.picture as pic3 FROM pictures p1 left join pictures p2 on p1.userID=p2.userID and p1.picture<>p2.picture left join pictures p3 on p1.userID=p3.userID and p1.picture<>p3.picture and p2.picture<>p3.picture GROUP BY p1.userID </code></pre> This will select three images for each user. If a user has less than three images, it will show nulls, if it has more, it chooses three between all of them. An alternative, that show three images each one in a different row, is this query that makes use of variables: <pre><code>SELECT userid, picture FROM ( SELECT userid, picture, case when @prec_id=userid then @row:=@row+1 else @row:=1 end as row, @prec_id:=userid FROM `pictures`, (SELECT @prec_id:=0, @row:=0) s ORDER BY userid) s WHERE row<=3 </code></pre> EDIT: to show three images for each user at a time I would use my first query, and I would start with some code like this: <pre><code><?php $mysqli = new mysqli("localhost", "username", "password", "test"); $image_path = "../images/"; $no_image = "../image/no_image.jpg"; if(!isset($_GET['first'])){ $first = 0; } else { $first = (int) $_GET['first']; } if ($stmt = $mysqli->prepare("SELECT p1.userID, p1.picture as pic1, p2.picture as pic2, p3.picture as pic3 FROM pictures p1 left join pictures p2 on p1.userID=p2.userID and p1.picture<>p2.picture left join pictures p3 on p1.userID=p3.userID and p1.picture<>p3.picture and p2.picture<>p3.picture GROUP BY p1.userID LIMIT ?,1")) { $stmt->bind_param("i", $first); $stmt->execute(); $stmt->bind_result($user, $pic1, $pic2, $pic3); $stmt->fetch(); $stmt->close(); } $mysqli->close(); ?> <div style="position:absolute; top:50px; left:100px; width:800px; text-align: center;"> <img src="<?PHP echo (isset($pic1) ? $image_path.$pic1 : $no_image); ?>" width="176px" height="197px"> <img src="<?PHP echo (isset($pic2) ? $image_path.$pic2 : $no_image); ?>" width="176px" height="197px"> <img src="<?PHP echo (isset($pic3) ? $image_path.$pic3 : $no_image); ?>" width="176px" height="197px"> </div> </code></pre> (it has be improved, but you could start with it. I'm using mysqli instead of mysql)
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POShow three images from each user
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USfthiella
UserOwnerUserId
1. USfthiella
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. POShow three images from each user
 singulars
 PostTypePostTypeId
 PTQuestion
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
2. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
3. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. CODoes this always pick .picture values from a single row? I'd be worried that p1.picture might choose a different grouped row than p3.picture (causing them to be the same).
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
2. COnice, but say it was 100, is there an alternative to the alised joins?
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
3. CO@dagon i edited and added an alternative, it uses variables so it is not standard SQL but works only in MySql
 singulars
 PostPostId
 PO
 UserUserId
 USfthiella

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