Question

如何对数据进行分组以便遵循排序？

SELECT tt.id_img, 
   tt.number_public, 
   tt.time_post, 
   tt.id_public 
FROM (SELECT 
        `number_public`, 
        `id_img`, 
        `time_post`, 
        birthday_publics.id_public

        FROM  birthday_time_post LEFT JOIN birthday_publics 
        ON  birthday_publics.id = birthday_time_post.number_public 
        WHERE birthday_time_post.time_post IN(
                                              SELECT MIN(time_post) 
                                              FROM   birthday_time_post 
                                              GROUP  BY number_public
                                           ) 
        ORDER  BY time_post
    ) tt

按列time_post

排序

照片请求 enter image description here

Answer 1

这应该足够了

  SELECT 
          b.`number_public`, 
          b.`id_img`, 
          b.`time_post`, 
          birthday_publics.id_public

  FROM  birthday_time_post b
  INNER JOIN (
      SELECT MIN(time_post) min_time
      FROM   birthday_time_post 
      GROUP  BY number_public
  ) t on t.min_time = b.time_post 
  LEFT JOIN birthday_publics  ON  birthday_publics.id =b.number_public 

  order by b.time_post

发送请求GROUP by

1 个答案: