关于使用多个SQL GROUP语句的问题

Question

因此，最终我试图展示一位投手在我的棒球联盟中获得Cy Young奖的总次数，然后他们在本赛季获得该奖项，但按联赛名称排序，因为一名投手可以在同一年在不同的联赛中获得该奖项。

这就是我试图显示数据的方式：Andrew Jones (4) - 2021,2020 (18+)；2021 (28+)；2021 (38+)，因此我需要Seasons列来显示这样的数据： 2021,2020 (18+)；2021 (28+)；2021 (38+)

我有3个mySQL表(季节、联赛、CY_YOUNG)：

联赛

| LEAGUE_ID | LEAGUE_NAME   |
| -------- | -------------- |
| 1        | 18+            |
| 2        | 28+            |
| 3        | 38+            |
| 4        | 48+            |

季节

| SEASON_ID| LEAGUE_ID      | SEASON_YEAR |
| --------   | -------------| ----------- |
| 332        | 1            |   2021    |
| 333        | 2            |   2021    |
| 334        | 3            |   2021    |
| 335        | 4            |   2021    |
| 300        | 1            |   2020    |
| 301        | 2            |   2020    |
| 302        | 3            |   2020    |
| 303        | 4            |   2020    |

CY_YOUNG

| SEASON_ID  | PLAYER_NAME    | PLACE     |
| --------   | -------------- | ----------|
| 332        | Andrew Jones   |   1       |
| 332        | Mike Smith     |   2       |
| 333        | Andrew Jones   |   1       |
| 333        | Jacob Grimes   |   2       |
| 334        | Andrew Jones   |   1       |
| 334        | Travis Deane   |   2       |
| 300        | Andrew Jones   |   1       |

下面是我当前的SQL查询：

   SELECT PLAYER_NAME, COUNT(ID) AS TotalWins, GROUP_CONCAT(DISTINCT CONCAT(S.SEASON_YEAR,' (',L.LEAGUE_NAME) 
   ORDER BY S.SEASON_YEAR DESC SEPARATOR '), ') AS Seasons
   FROM CY_YOUNG
   JOIN SEASONS S ON S.SEASON_ID = CY_YOUNG.SeasonID
   JOIN LEAGUES L ON L.LEAGUE_ID = S.LEAGUE_ID
   WHERE CY_YOUNG.Place = 1
   GROUP BY PLAYER_NAME
   HAVING TotalWins > 1
   ORDER BY TotalWins DESC;  

Seasons专栏目前的内容如下：2021 (18+)、2020 (18+)、2021 (38+)，但我希望它像这样吐出来： 2021,2020 (18+)；2021 (28+)；2021 (38+)。我知道我很亲近，所以任何帮助都是非常感谢的！

Answer 1

您需要两个级别的聚合：

SELECT PLAYER_NAME, 
       SUM(counter) AS TotalWins,  
       GROUP_CONCAT(years, ' (', LEAGUE_NAME, ')' ORDER BY LEAGUE_NAME, years) AS Seasons
FROM (
  SELECT PLAYER_NAME, L.LEAGUE_NAME,
         COUNT(*) counter,
         GROUP_CONCAT(S.SEASON_YEAR ORDER BY S.SEASON_YEAR DESC) AS years
  FROM CY_YOUNG C
  JOIN SEASONS S ON S.SEASON_ID = C.SEASON_ID
  JOIN LEAGUES L ON L.LEAGUE_ID = S.LEAGUE_ID
  WHERE C.Place = 1
  GROUP BY C.PLAYER_NAME, L.LEAGUE_NAME
) t  
GROUP BY PLAYER_NAME
HAVING TotalWins > 1
ORDER BY TotalWins DESC; 

见演示。