在本赛季打球的球员的职业平均值

Question

我试图列出球员的职业生涯平均值，但仅包括在2018年至少参加过一场比赛的球员，但我的问题只是回归那些在2018年打过'仅'的球员，而不是职业平均数。所有在2018年至少参加过一场比赛的球员。

SELECT PlayerID
     , Surname
     , AKA
     , COUNT(*) AS Played
     , ROUND(AVG(Kicks),1) AS K
     , ROUND(AVG(Handballs),1) AS HB
     , ROUND(AVG(Marks),1) AS M
     , Season
  FROM `PlayerDetails` 
 WHERE Team = 'Team A'
 GROUP 
    BY PlayerID 
HAVING Season = 2018
 ORDER 
    BY Surname ASC 

Answer 1

您需要删除 brew cleanup 子句并添加到HAVING子句：

WHERE

您所拥有的SELECT PlayerID, Surname,AKA, COUNT(*) AS Played, ROUND(AVG(Kicks),1) AS K, ROUND(AVG(Handballs),1) AS HB, ROUND(AVG(Marks),1) AS M, Season FROM `PlayerDetails` p1 WHERE Team = 'Team A' AND EXISTS (SELECT * FROM `PlayerDetails` p2 WHERE p2.playerID = p1.playerID AND Season = 2018) GROUP BY PlayerID ORDER BY Surname ASC 子句 - 正如您所发现的那样 - 仅将查询限制为2018年的结果。我添加到HAVING的{​​{1}}子句会找到任何有在2018年开始。