按组选择字段数
我有一个包含下表的表格：
id | score | type
1 | 1 | "a"
2 | 4 | "b"
3 | 2 | "b"
4 | 53 | "c"
5 | 8 | "a"
我需要根据类型选择分数计数。所以我的结果将是：
totalScore | type
9 | "a"
6 | "b"
53 | "c"
我尝试了 DISTINCT 和 GROUP BY ，但似乎都不起作用。我尝试过的 SQL：
SELECT * , COUNT( `score` ) AS totalScore
FROM `table`
GROUP BY `type`
但是
SELECT DISTINCT `type`, COUNT(score) as totalScore FROM `table`
这些似乎不起作用。
有人可以帮忙吗？
霍什
I have a table with the following table:
id | score | type
1 | 1 | "a"
2 | 4 | "b"
3 | 2 | "b"
4 | 53 | "c"
5 | 8 | "a"
I need to select the count of score based on the type. So my results will be:
totalScore | type
9 | "a"
6 | "b"
53 | "c"
I tried both DISTINCT and GROUP BY by neither seemed to work. The SQLs I tried:
SELECT * , COUNT( `score` ) AS totalScore
FROM `table`
GROUP BY `type`
and
SELECT DISTINCT `type`, COUNT(score) as totalScore FROM `table`
But these don't seem to work.
Can anyone help?
Hosh
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评论（2）
这应该有效...
SELECT sum(score) AS Total FROM table GROUP BY typeThis should work...
SELECT sum(score) AS total FROM table GROUP BY type