Question

我有一个数据库：带有表格的数据库：表格和一些字段：

id  fname       dphone      count_pic   dup_id  

6055903 Karla       5126xxx798  1       57  
6173767 Aaliyah     4082xxx534  4       39  
5611411 Aaliyah     4082xxx534  15      39  
5611211 Aaliyah     4082xxx534  18      39  
4234798 Abby        3057xxx974  31      16  
6166691 Walter      6178xxx280  1       74  
3375576 Walter      6178xxx280  17      74

我要做的是选择具有最小count_pic的字段和具有更大count_pic且具有相同dup_id和fname的字段

如何在mysql中做到这一点？

我得到的答案与那些东西相匹配，但不是fname：

 SELECT *
  FROM `table` t1
INNER JOIN (SELECT MIN(count_pic) AS minpic,
               MAX(count_pic) AS maxpic,
               dup_id
          FROM `table`
      GROUP BY dup_id) t2 ON t1.dup_id = t2.dup_id
                         AND (t1.count_pic = minpic
                           OR t1.count_pic = maxpic)

如何在循环中添加fname的任何想法？现在它只跟踪相同的dup_id

感谢。

Answer 1

SELECT *
FROM table
WHERE (fname, countpic, dupid) in (
   SELECT fname, max(countpic), dupid FROM table GROUP BY fname, dupid
   union
   SELECT fname, min(countpic), dupid FROM table GROUP BY fname, dupid
)

mysql，如何统计结果是一样的？

1 个答案: