MYSQL＆gt;计算同时添加的记录数

Question

首先，我已经搜索过网站，找不到任何可以达到我需要的结果。

以下是我要做的事情：

id  calldate            disposition     user_id
1   12/16/2012 21:34    ANSWERED        21
2   12/16/2012 21:34    ANSWERED        21
3   12/16/2012 21:59    ANSWERED        21
4   12/16/2012 22:11    ANSWERED        21
5   12/16/2012 22:11    FAILED          21

现在我想计算同时插入的行数（对应行的时间和状态）。

因此，对于上述记录，结果将类似于：

calldate            count
12/16/2012 21:34    2
12/16/2012 21:59    1

这是我到目前为止所取得的成绩，但仍然无法取得预期的成果。

SELECT 
    COUNT(*) AS total, 
    DATE(calldate) AS date, 
    HOUR(calldate) AS hour, 
    calldate
FROM calls 
WHERE disposition='ANSWERED'
GROUP BY date, hour HAVING total > 1 ORDER BY calldate ASC

任何帮助都将受到高度赞赏。

谢谢

Answer 1

这样做你想要的吗？

SELECT calldate, COUNT(*) AS total
FROM calls 
WHERE disposition = 'ANSWERED'
GROUP BY calldate
HAVING total > 1
ORDER BY calldate ASC;