Mysql 通过将sql中的多个列分组来查找列中的最小值

我让列（submit_type）在该值中插入新列，这些值是按大小写条件设置的 以下是我的sql查询：

+----+-------+-----------------------------+-------------------------+-------------------+-------------+
| Id | grade | shot_name                   | submitted_by_supervisor | version_submitted | submit_type |
+----+-------+-----------------------------+-------------------------+-------------------+-------------+
| 27 | A     | elx_reel01_scn1020_shot1720 | Salil Devji             | 33                | Fresh       |
| 27 | A     | elx_reel01_scn1020_shot1720 | Deepali                 | 34                | Fresh       |
| 37 | A     | elx_reel01_scn1030_shot3480 | Salil Devji             | 15                | Fresh       |
| 37 | A     | elx_reel01_scn1030_shot3480 | Salil Devji             | 20                | Fresh       |
| 7  | B     | elx_reel01_scn1010_shot1030 | Darshan                 | 4                 | Fresh       |
| 7  | B     | elx_reel01_scn1010_shot1030 | Varion                  | 6                 | Fresh       |
| 17 | B     | elx_reel01_scn1010_shot1140 | Varion                  | 17                | Fresh       |
| 17 | B     | elx_reel01_scn1010_shot1140 | Varion                  | 14                | Fresh       |
+----+-------+-----------------------------+-------------------------+-------------------+-------------+

上述查询在（submit_type）列的所有字段中提供“Fresh”值。这是不正确的

我需要的是，我正在对列进行分组，并找到列的最小值

工作流程：- A级=>组（快照名称）=>最小值（已提交版本）=>在中设置“新鲜”或“一旦提交”（提交类型）

在“A”级中，具有相同的炮点名称，将其分组（炮点名称），然后查找最小值（已提交版本），如果找到最小值，则在（提交类型）列中设置“新鲜”或设置“一旦提交”值。 同样适用于B级，如A级

我需要这样的结果=>

SELECT   s.shot_id,
         s.shot_name ,
         isn.reviewer AS 'submitted_by_supervisor',
         isn.version  AS 'version_submitted',
         isn.grade    AS 'grade',
         CASE
                  WHEN isn.version = Min(isn.version) THEN 'FRESH'
                  ELSE 'Once Submitted'
         end AS 'submit_type'
FROM     viewd_elx.india_supe_note isn
JOIN     viewd_elx.shot s
ON       s.shot_id = isn.shot_id
JOIN     viewd_elx.team t
ON       isn.shot_id = t.shot_id
JOIN     viewd_elx.viewd_team vt
ON       isn.shot_id = vt.shot_id
WHERE    isn.promoted='Yes'
AND      isn.grade IN ('A',
                       'B')
GROUP BY isn.grade,
         s.shot_id,
         isn.version; 

---

这里的问题是，您也在按

isn.version

字段进行分组，并试图计算该组中相同字段的最小值。它只会返回相同的值，这就是为什么所有的值都是“新鲜的”。您需要在子查询（）中分别确定一组

（等级、快照id）

的最小

isn.version

值，然后使用该值检查是否为最小值

+----+-------+-----------------------------+-------------------------+-------------------+----------------+
| Id | grade | shot_name                   | submitted_by_supervisor | version_submitted | submit_type    |
+----+-------+-----------------------------+-------------------------+-------------------+----------------+
| 27 | A     | elx_reel01_scn1020_shot1720 | Salil Devji             | 33                | Fresh          |
| 27 | A     | elx_reel01_scn1020_shot1720 | Deepali                 | 34                | Once Submitted |
| 37 | A     | elx_reel01_scn1030_shot3480 | Salil Devji             | 15                | Fresh          |
| 37 | A     | elx_reel01_scn1030_shot3480 | Salil Devji             | 20                | Once Submitted |
| 7  | B     | elx_reel01_scn1010_shot1030 | Darshan                 | 4                 | Fresh          |
| 7  | B     | elx_reel01_scn1010_shot1030 | Varion                  | 6                 | Once Submitted |
| 17 | B     | elx_reel01_scn1010_shot1140 | Varion                  | 17                | Once Submitted |
| 17 | B     | elx_reel01_scn1010_shot1140 | Varion                  | 14                | Fresh          |
+----+-------+-----------------------------+-------------------------+-------------------+----------------+

---

看：谢谢你的建议，现在我的问题是完美的。

SELECT   s.shot_id,
         s.shot_name ,
         isn.reviewer AS submitted_by_supervisor,
         isn.version  AS version_submitted,
         isn.grade    AS grade,
         CASE
             WHEN isn.version = dt.min_version THEN 'FRESH'
             ELSE 'Once Submitted'
         END AS 'submit_type'
FROM     viewd_elx.india_supe_note isn
JOIN     viewd_elx.shot s
ON       s.shot_id = isn.shot_id
JOIN     viewd_elx.team t
ON       isn.shot_id = t.shot_id
JOIN     viewd_elx.viewd_team vt
ON       isn.shot_id = vt.shot_id
JOIN     (
           SELECT grade, 
                  shot_id, 
                  MIN(version) AS min_version 
           FROM viewd_elx.india_supe_note 
           WHERE promoted = 'YES' 
             AND grade IN ('A', 'B') 
           GROUP BY grade, 
                    shot_id
        ) AS dt 
ON       dt.grade = isn.grade 
         AND dt.shot_id = isn.shot_id 
WHERE    isn.promoted='Yes'
         AND isn.grade IN ('A','B')
GROUP BY s.shot_id, 
         s.shot_name, 
         isn.reviewer, 
         isn.version, 
         isn.grade, 
         dt.min_version