Question

我的表格如下：

Year    Week   Points
2007     1       20
2007     1       15
2007     2       15
2007     2       15
2008     1       8
2008     1       10

我希望我的结果是：

Most Points: 35 (2007 Week 1)
2nd Most Points: 30 (2007 Week 2)
3rd Most Points: 18 (2008 Week 1)

我正在使用：

$query = "SELECT SUM(POINTS) ";
$query .= " FROM SCHEDULE";
$query .= " AND WEEK = '1' ";
$query .= " AND YEAR = '2008'";

有没有办法让积分SUM不必为每周和每年运行单独的查询？

Answer 1

您可以使用GROUP BY，例如：

SELECT YEAR, MONTH, SUM(POINTS) FROM SCHEDULE GROUP BY WEEK,YEAR

然后，这将形成具有相同WEEK和YEAR的项目组，然后对这些项目进行求和。

Answer 2

这听起来像一个简单的查询。你试过这个吗？：

select `Year`, `Week`, sum(`Points`) as Total_Points
from myTable
group by `Year`, `Week`
order by sum(`Points`) desc
limit 3

Answer 3

您的查询应该是

SELECT
    SUM(Points) total,
    CONCAT(`Year`, ' Week ', `Week`)
FROM
    SCHEDULE
GROUP BY
    `Year`,
    `Week`,
ORDER BY
    total DESC