从某些字段的2个表中选择顶部*

Question

我有2张这样的桌子

[信息]

[得分]

我想在5月DESC class a: def __init__(self,b,c): self.b=b self.c=c def getstring(self): print "Please enter input" self.x=raw_input() return x def printstring(self): y=self.x.upper() return y def sum(self): c=self.c+self.b return c d=a(23,53) d.getstring() d.printstring() 结果应该看起来像这样。

Answer 1

尝试在派生表中的两个表上进行JOIN，并在SUM上获得Score和该值的顺序

SELECT TOP 3 *
FROM(
SELECT
    I.User_Id, I.[Name], I.Age, Score = SUM(S.Score)
FROM
    Info I
INNER JOIN
    Score S On S.User_Id = I.User_Id
WHERE MONTH(S.[DATE]) = 5 --May (however I suspect this might not be a DATE object)
GROUP BY
    I.User_Id, I.[Name], I.Age
) X
ORDER BY X.Score DESC

Answer 2

在这里，您可以使用join语句。

SELECT TOP(3) a.user_id, a.Name, a.Age, b.Score FROM Users a JOIN Score b On a.user_id=b.user_id Order By b.Score desc

Answer 3

以下内容会有所帮助。

SELECT TOP 3 S.User_Id, SUM(S.Score) Score, U.Name, U.Age
FROM Info U
INNER JOIN Score S ON U.User_Id = S.User_Id
WHERE MONTH(S.Date) = 5 --Only May Month.
GROUP BY S.User_Id, U.Name, U.Age
ORDER BY 2 DESC