[英]Select max of a column based on another column ID
我正在嘗試在具有屬性teamID,salary,yearID的表中獲取每年的最高薪水。 不應該很難嗎? 這是我的查詢:
SELECT teamID, MAX(tS.teamSalary), yearID
FROM
(SELECT
teamID,
sum(salary) AS teamSalary,
yearID
FROM salaries
GROUP BY teamID, yearID) tS
GROUP BY yearID;
內部查詢工作正常,但外部查詢僅報告每個組的第一個teamID。 我究竟做錯了什么?
Inner query output:
A 1 2000
B 1 2000
C 2 2000
A 2 2001
B 3 2001
A 2 2002
B 2 2002
Full query output:
A 1 2000
A 2 2001
A 2 2002
Desired output:
C 2 2000
B 3 2001
A 2 2002
首先,您會按年份獲得maxSalary,然后您將獲得更多信息:
SELECT teamID, salary, yearID
FROM salaries
JOIN
(SELECT MAX(salary) AS maxSalary,
yearID
FROM salaries
GROUP BY yearID) tS
ON ts.yearID = salaries.yearID
AND ts.maxSalary = salaries.salary
編輯:不確定是否要某年的最高薪水,那么它屬於哪個團隊,或者是否要按球隊和年份的最高薪水。 第二個選項在這里:
SELECT MAX(salary) AS maxSalary, yearID, teamID
FROM salaries
GROUP BY yearID, teamID
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