SQL组：计算多个事物

Question

现在我已经获得了以下（我的）SQL语句，它根据小时返回托管数量。

SELECT 
    COUNT(*) AS amount
    HOUR(date) AS hour
    -- [1]
FROM
    table
GROUP BY
    HOUR(date)

但我实际上想要另一个包含小时出现天数的结果。基本上是这样的：

[1] = COUNT(DAY(date), MONTH(date), YEAR(date)) AS day_count

示例：

id  |   date
0   |   01/01/2001 5:15
1   |   01/01/2001 5:10
2   |   01/01/2001 6:03
3   |   01/01/2001 7:04
4   |   02/01/2001 5:00

应该返回

amount  |   hour    |   day_count
3       |   5       |   2
1       |   6       |   1
1       |   7       |   1

Answer 1

我认为你只需要按小时和日期分开日子，并按他们分组......

SELECT count(*) as `amount`
     , count(hour(date)) as `Hour`
     , count(day(date)) as `Day_Count`
FROM table 
GROUP BY hour(Date), day(date)