發佈第二個重複表中的

Question

我有下面的語句

SELECT whatweek, username, team FROM weekpicks GROUP BY team, username HAVING count(*) > 1 ORDER BY 'whatweek' asc

失認沽將在表中爲用戶找到所有的重複與但卻列表不輸出僅第二發生。有時它會發布第一次發生，其他發生第二次發生。我需要它只發布第二個事件。

Answer 1

您可以計算子查詢

SELECT (
     SELECT whatweek 
     FROM weekpicks t 
     WHERE t.username = weekpicks.username 
     AND t.team = weekpicks.team 
     ORDER BY whatweek DESC 
     LIMIT 1) AS `needed_whatweek`, 
     username, team 
    FROM weekpicks 
    GROUP BY team, username 
    HAVING count(*) > 1 

編輯所需whatweek或者使用MAX（），其preffer我想：

SELECT MAX(whatweek), username, team FROM weekpicks 
GROUP BY team, username HAVING count(*) > 1