查詢獲取的用戶

Question

細節這是我query產生如下表

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 Small_pic_path, 
(
  SELECT count(*) FROM likes 
  WHERE element_id=user_messages.messageid 
 )AS Total_Likes 

FROM user_messages 
WHERE user_messages.userid='1'; 

在這裏，我想包括sentby的細節是在smsusers表ID。 我想要詳細信息fname，來自smsusers表的lname以及來自profile_pic表的small_pic_path。 如何獲取詳細信息。

Answer 1

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 Small_pic_path, 
     (
      SELECT count(*) 
      FROM likes 
      WHERE element_id=user_messages.messageid 
     ) AS Total_Likes, 
     smsusers.* -- select the columns you want to show 
FROM user_messages 
     INNER JOIN smsusers 
     ON user_messages.SENTBY = smsusers.id 
WHERE user_messages.userid= '1'; 

• SQLFiddle Demo

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• Visual Representation of SQL Joins