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我正在从多个表中获取数据，所有其他数据均已正确获取，但 post_images 的 IMAGE_POST_ID POST_IMG_PATH字段未根据 user_messages 的 messageid 显示。

我的桌子是

1)post_images

| IMAGE_ID |    SMALL_PIC_PATH |  LARGE_PIC_PATH |                        ADDDATE | VISIBILITY | USERID | MESSAGEID |
---------------------------------------------------------------------------------------------------------------------
|     i_i1 | /post/small/a.jpg | /post/img/a.jpg | January, 01 2012 00:00:00+0000 |     public |      2 |        m1 |
|     i_i2 | /post/small/b.jpg | /post/img/b.jpg | January, 01 2012 00:00:00+0000 |     public |      2 |        m1 |
|     i_i3 | /post/small/c.jpg | /post/img/c.jpg | January, 01 2012 00:00:00+0000 |     public |      2 |        m1 |
|     i_i4 | /post/small/d.jpg | /post/img/d.jpg | January, 01 2012 00:00:00+0000 |     public |      2 |        m1 |
|     i_i5 | /post/small/e.jpg | /post/img/e.jpg | January, 01 2012 00:00:00+0000 |     public |      3 |        m2 |
|     i_i6 | /post/small/f.jpg | /post/img/f.jpg | January, 01 2012 00:00:00+0000 |     public |      3 |        m2 |

2)user_messages

| MESSAGEID |           MESSAGE |   ADDDATE | SENTBY | VISIBILITY | USERID |
----------------------------------------------------------------------------
|        m1 | Hello how are you | 23-2-2012 |      2 |     public |      1 |
|        m2 |            Hello  | 23-2-2012 |      3 |     public |      1 |
|        m3 |          Hiiiiiii | 23-2-2012 |      4 |     public |      1 |

我想获取相关消息 id 的所有 image_id 和 small_pic_path。但是通过我的查询，它显示了所有带有 messageid 的 image_id small_pic_path。

这是我的查询

SELECT user_messages.messageid,user_messages.message,
user_messages.sentby,user_messages.visibility,


(
   SELECT GROUP_CONCAT(  `post_images`.`image_id` SEPARATOR ';')
    FROM  `post_images`
    JOIN user_messages
  ON `post_images`.`messageid` =user_messages.messageid
) AS  `Image_post_id`,
(
   SELECT GROUP_CONCAT(  `post_images`.`small_pic_path` SEPARATOR ';')
    FROM  `post_images`
    JOIN user_messages
  ON `post_images`.`messageid` =user_messages.messageid
) AS Post_Img_path,
(
  SELECT count(*) FROM likes
  WHERE element_id=user_messages.messageid
  )AS Total_Likes
, smsusers.fname as Msg_sender_fname,
smsusers.lname as Msg_sender_lname,
profile_pic.small_pic_path as Msg_sender_pic

FROM user_messages
      INNER JOIN smsusers ON
        user_messages.SENTBY = smsusers.id
 INNER JOIN profile_pic ON
 user_messages.SENTBY = profile_pic.userid
WHERE user_messages.userid='1';

这是我的查询链接

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1 回答 1

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我得到了答案。在这里我没有使用group by

于 2013-02-25T05:54:58.743 回答