MySql从另一个数据库更新表join and group by

如果我有表日志：

ID   Date     P_id     TYPE
-------------------------------
1   2016-9-1   11    adClick       
2   2016-9-1   22   adComplete
3   2016-9-1   11   adComplete
4   2016-9-3   22    adClick        
5   2016-9-3   22    adClick        
6   2016-9-1   44    adClick        
7   2016-9-3   44    adComplete        
8   2016-9-3   44    adClick        
9   2016-9-3   11    adClick        
-------------------------------

以及另一份具有相同日期和p_id的表格报告，如下所示：

ID   Date     P_id     clicks   
--------------------------------
1   2016-9-1   11      
2   2016-9-1   11      
3   2016-9-1   22        
4   2016-9-3   22      
5   2016-9-1   11      
6   2016-9-1   44           
5   2016-9-1   44      
6   2016-9-1   11           
---------------------------------

我需要MySQL查询来填充报告表中的点击，并根据键（日期和p_id）：

因此，该表将是：

ID   Date     P_id     clicks   
--------------------------------
1   2016-9-1   11      4 / 1
2   2016-9-1   11      4 / 1
3   2016-9-1   22        0
4   2016-9-3   22      2 / 2
5   2016-9-1   11      4 / 1
6   2016-9-1   44      2 / 1     
5   2016-9-1   44      2 / 1
6   2016-9-1   11      4 / 1      
---------------------------------

示例，第一行：

2016-9-1   11      4 / 1 

4 rows (2016-9-1   11) in report table by
1 row  (2016-9-1   11) in logs table with type=adClick

到目前为止，我所尝试的：

UPDATE report AS r 

INNER JOIN 
(
    SELECT 
        *, count(id) AS count_value
    FROM 
        logs
    WHERE
        type= "adClick"
    GROUP BY 
        date,p_id

) log

ON  r.date=log.date AND  r.p_id=log.p_id

SET r.clicks=(log.count_value / (SELECT COUNT(lof) from report) );

---

提前感谢

您可以使用条件聚合进行此操作：

UPDATE report AS r INNER JOIN 
       (SELECT date, p_id, count(*) AS cnt,
               SUM(type = 'adClick') as cnt_adclick
        FROM logs
        GROUP BY  date,p_id
       ) l
       ON r.date = l.date AND r.p_id = l.p_id
    SET r.clicks = cnt_adclick / cnt;

您也可以使用

avg（）

而不是除法执行此操作：

UPDATE report AS r INNER JOIN 
       (SELECT date, p_id, 
               AVG(type = 'adClick') as avg_clicks
        FROM logs
        GROUP BY  date,p_id
       ) l
       ON r.date = l.date AND r.p_id = l.p_id
    SET r.clicks = avg_clicks;

---

可以使用条件聚合执行此操作：

UPDATE report AS r INNER JOIN 
       (SELECT date, p_id, count(*) AS cnt,
               SUM(type = 'adClick') as cnt_adclick
        FROM logs
        GROUP BY  date,p_id
       ) l
       ON r.date = l.date AND r.p_id = l.p_id
    SET r.clicks = cnt_adclick / cnt;

您也可以使用

avg（）

而不是除法执行此操作：

UPDATE report AS r INNER JOIN 
       (SELECT date, p_id, 
               AVG(type = 'adClick') as avg_clicks
        FROM logs
        GROUP BY  date,p_id
       ) l
       ON r.date = l.date AND r.p_id = l.p_id
    SET r.clicks = avg_clicks;

尝试使用

CONCAT（）

尝试使用

CONCAT（）

---

谢谢大家，以下是我的工作：

UPDATE report AS r 
INNER JOIN 
(
    SELECT cnt_adclick,count(*) as cnt_report,date, report.P_id
    FROM report
    INNER JOIN 
    (
        SELECT date as date, P_id, SUM(event_type = 'adClick') as cnt_adclick
        FROM logs
        GROUP BY date,P_id
    ) inner_log

    ON report.date = inner_log.date AND report.P_id = inner_log.P_id
    GROUP BY report.date, report.P_id
) l

ON r.date = l.date AND r.P_id= l.P_id
SET r.clicks = cnt_adclick / cnt_report;

---

谢谢大家，以下是我的工作：

UPDATE report AS r 
INNER JOIN 
(
    SELECT cnt_adclick,count(*) as cnt_report,date, report.P_id
    FROM report
    INNER JOIN 
    (
        SELECT date as date, P_id, SUM(event_type = 'adClick') as cnt_adclick
        FROM logs
        GROUP BY date,P_id
    ) inner_log

    ON report.date = inner_log.date AND report.P_id = inner_log.P_id
    GROUP BY report.date, report.P_id
) l

ON r.date = l.date AND r.P_id= l.P_id
SET r.clicks = cnt_adclick / cnt_report;

---

您尝试的查询在哪里？@EatPeanutButter更新了问题。请检查。您尝试的查询在哪里？@EatPeanutButter，更新了问题。请检查。count（*）AS cnt：这不是我想要的，我想要的是具有相同键的报表表的计数。这将logs tablecount（*）的总数作为cnt给出：这不是我想要的，我想要的是具有相同键的报表表的计数。这将logs tablecount（*）的总数作为计数：这应该是报表表中具有与count相同的键计数（*）的行的计数：这应该是报表表中具有相同键的行的计数