Question

我想基于messageid group_concate image_id和small_pic_path路径。但是group concate显示了所有image_id和第一个messageid的路径

如何解决此问题

没有group_concate它正常工作

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

post_images.image_id,
post_images.small_pic_path

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

显示正确的输出Demo is

我想基于user_messages的messageid group_concate image_id，post_pict_path的帖子图片哪个不能正常工作

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

GROUP_CONCAT( post_images.image_id SEPARATOR ';')
as Image_id,
GROUP_CONCAT( post_images.small_pic_path SEPARATOR ';')
as Image_path

FROM user_messages
      INNER JOIN smsusers ON
        user_messages.SENTBY = smsusers.id
 left outer JOIN post_images ON
user_messages.messageid=post_images.messageid
WHERE user_messages.userid='1';

Demo is

Answer 1

您缺少GROUP BY条款，

GROUP BY  user_messages.messageid,
          user_messages.message,
          user_messages.sentby,
          user_messages.visibility

SQLFiddle Demo

GROUP_CONCAT显示全部记录

1 个答案: