Question

我正在尝试计算两组数据，这些数据列在相同的表名下，具有特定的日期范围。

表'事件'

u_id event  Create
123  F_log  25-Sep-16
127  C_log  25-Sep-16
123  F_log  25-Sep-16
126  F_log  25-Sep-16
185  M_log  25-Sep-16
146  D_log  25-Sep-16
173  F_log  26-Sep-16
183  C_log  26-Sep-16
193  F_log  26-Sep-16
204  M_log  27-Sep-16
214  D_log  27-Sep-16
225  F_log  27-Sep-16

预期结果

Created    F_log    C_log
25-Sep-16   2       1
26-Sep-16   2       1

我的查询没有给出正确的结果;

SELECT COUNT (DISTINCT e.user_id) AS Flash,
         COUNT (DISTINCT et.user_id) AS Client,
         TO_CHAR (e.created) AS Date_created
    FROM events e INNER JOIN events et ON e.user_id = et.user_id
   WHERE     e.created BETWEEN '25-SEP-15' AND '27-SEP-15'
         AND e.event_type = 'Flash C log'
         AND et.event_type = 'Client C log'
GROUP BY TO_CHAR (e.created);

Answer 1

<强>查询

SELECT t.`Create`, 
SUM(CASE WHEN t.`F_log` > 0 THEN 1 ELSE 0 END) as `F_log`,
SUM(CASE WHEN t.`C_log` > 0 THEN 1 ELSE 0 END) as `C_log` FROM(
    select `u_id`, `Create`,
    SUM(CASE WHEN `event` = 'F_log' THEN 1 ELSE 0 END) AS `F_log`,
    SUM(CASE WHEN `event` = 'C_log' THEN 1 ELSE 0 END) AS `C_log`
    FROM `Event`
    GROUP BY `u_id`, `Create`
)t
GROUP BY t.`Create`;

Answer 2

COUNT必须在单独的子查询中完成。这应该有用。

SELECT DISTINCT E.created,F.flash,C.client
FROM events E
LEFT JOIN (
    SELECT created,COUNT(DISTINCT user_id) as flash
    FROM events
    WHERE event_type LIKE 'Flash C log'
    GROUP BY created
) F
ON F.created = E.created
LEFT JOIN (
    SELECT Created,COUNT(DISTINCT user_id) as client
    FROM events
    WHERE event_type LIKE 'Client C log'
    GROUP BY created
) C
ON C.created = E.created
WHERE E.created BETWEEN '2016-09-25' AND '2016-09-27'

Fiddle with results

编辑：截至您的评论，我提出了一个问题，即为每个日期添加一列不同的组合用户ID与客户端和Flash日志。我添加了一些小数据来测试。

SELECT DISTINCT E.created,F.flash,C.client,FC.combined
FROM events E
LEFT JOIN (
    SELECT created,COUNT(DISTINCT user_id) as flash
    FROM events
    WHERE event_type LIKE 'Flash C log'
    GROUP BY created
) F
ON F.created = E.created
LEFT JOIN (
    SELECT Created,COUNT(DISTINCT user_id) as client
    FROM events
    WHERE event_type LIKE 'Client C log'
    GROUP BY created
) C
ON C.created = E.created
LEFT JOIN (
    SELECT Created,COUNT(DISTINCT user_id) as combined
    FROM events
    WHERE event_type LIKE 'Client C log' OR event_type LIKE 'Flash C log'
    GROUP BY created
) FC
ON FC.created = E.created
WHERE E.created BETWEEN '2016-09-25' AND '2016-09-27'

SQL Fiddle for answer 2

Answer 3

选择to_char（强制转换（创建为日期），'YYYY-MM-DD'）作为Report_date， count（distinct（event_type in（'Flash C Log'）then user_id else 0 end））作为Flash_Log， count（distinct（case_type ='Client C Log'）然后user_id else 0 end））作为Client_Log 来自事件e 在'25 -SEP-16'和'27 -SEP-16'之间创建的地方 group by to_char（cast（创建为日期），'YYYY-MM-DD'）按to_char排序（强制转换（创建为日期），'YYYY-MM-DD'）;

需要帮助构建MYSQL查询以计算单行/表中的两个内容

3 个答案: