[英]MySQL SUM ( Query works but returns unexpected results )
我在两个表上执行MySQL查询
keyword_stats
+-------------+---------------+------+-----+-------------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+---------------+------+-----+-------------------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| keywordid | int(11) | NO | MUL | NULL | |
| campaignid | int(11) | NO | | NULL | |
| clicks | int(11) | NO | MUL | NULL | |
| impressions | int(11) | NO | MUL | NULL | |
| cost | decimal(10,2) | NO | MUL | NULL | |
| conversions | int(11) | NO | MUL | NULL | |
| timestamp | timestamp | NO | MUL | CURRENT_TIMESTAMP | |
| statsdate | date | NO | MUL | NULL | |
+-------------+---------------+------+-----+-------------------+----------------+
和
关键字表
+------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+--------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| clientid | int(11) | NO | MUL | NULL | |
| campaignid | int(11) | NO | | NULL | |
| keywordid | int(11) | NO | MUL | NULL | |
| text | varchar(125) | NO | MUL | NULL | |
| status | varchar(10) | NO | MUL | NULL | |
+------------+--------------+------+-----+---------+----------------+
6 rows in set (0.00 sec)
用下面的SQL查询
SELECT
k.status, statsdate,
SUM( impressions ) AS impressions, SUM( clicks ) AS clicks,
SUM( conversions ) AS conversions, SUM( cost ) AS cost
FROM keyword_stats
LEFT JOIN
(
SELECT
text,keywordid,status
FROM keywords
) AS k USING (keywordid)
WHERE
campaignid = 56486451
AND statsdate BETWEEN '2011-03-01' AND '2011-03-23'
AND k.status = "enabled"
GROUP BY keywordid
ORDER BY conversions DESC, clicks DESC, impressions DESC LIMIT 0, 10
随着结果
+---------+------------+-------------+--------+-------------+-----------+
| status | statsdate | impressions | clicks | conversions | cost |
+---------+------------+-------------+--------+-------------+-----------+
| enabled | 2011-03-01 | 71256166 | 242079 | 4247 | 891572.71 |
| enabled | 2011-03-01 | 1101 | 10 | 1 | 43.19 |
| enabled | 2011-03-01 | 210 | 6 | 0 | 23.40 |
| enabled | 2011-03-01 | 331 | 4 | 0 | 15.29 |
| enabled | 2011-03-01 | 672 | 3 | 0 | 11.41 |
| enabled | 2011-03-01 | 486 | 2 | 0 | 8.93 |
| enabled | 2011-03-01 | 254 | 2 | 0 | 9.48 |
| enabled | 2011-03-01 | 2201 | 1 | 0 | 2.96 |
| enabled | 2011-03-01 | 581 | 1 | 0 | 3.25 |
| enabled | 2011-03-01 | 483 | 1 | 0 | 4.39 |
+---------+------------+-------------+--------+-------------+-----------+
10 rows in set (12.12 sec)
该查询将按预期运行并执行,除非您可能会看到第一个结果包含意外结果,因为任何关键字都不可能具有如此之多的点击,转化或成本,我试图确定MySQL的位置合并总计以达到该结果
编辑添加的关键字ID
+------------+---------+------------+-------------+--------+-------------+-----------+
| keywordid | status | statsdate | impressions | clicks | conversions | cost |
+------------+---------+------------+-------------+--------+-------------+-----------+
| 2147483647 | enabled | 2011-03-01 | 71256166 | 242079 | 4247 | 891572.71 |
| 101936939 | enabled | 2011-03-01 | 1101 | 10 | 1 | 43.19 |
| 23039553 | enabled | 2011-03-01 | 210 | 6 | 0 | 23.40 |
| 117364874 | enabled | 2011-03-01 | 331 | 4 | 0 | 15.29 |
| 18862051 | enabled | 2011-03-01 | 672 | 3 | 0 | 11.41 |
| 16695651 | enabled | 2011-03-01 | 486 | 2 | 0 | 8.93 |
| 14690232 | enabled | 2011-03-01 | 254 | 2 | 0 | 9.48 |
| 18046691 | enabled | 2011-03-01 | 2201 | 1 | 0 | 2.96 |
| 22232901 | enabled | 2011-03-01 | 581 | 1 | 0 | 3.25 |
| 15072731 | enabled | 2011-03-01 | 483 | 1 | 0 | 4.39 |
+------------+---------+------------+-------------+--------+-------------+-----------+
10 rows in set (11.99 sec)
keywordid
是两个表中的PRIMARY KEY
。
最有可能的是,您的两个表中都有一个有大量记录的keywordid
,这导致此keywordid
上的交叉keywordid
。
还要注意,首先,由于要对k.status
进行过滤, k.status
LEFT JOIN
在查询中是多余的;其次, MySQL
在优化内联视图方面不是那么好。
只需使用此:
SELECT k.status, statsdate,
SUM( impressions ) AS impressions, SUM( clicks ) AS clicks,
SUM( conversions ) AS conversions, SUM( cost ) AS cost
FROM keyword_stats
JOIN keywords
USING (keywordid)
WHERE campaignid = 56486451
AND statsdate BETWEEN '2011-03-01' AND '2011-03-23'
AND k.status = "enabled"
GROUP BY
keywordid
ORDER BY
conversions DESC, clicks DESC, impressions DESC
LIMIT 0, 10
您是否需要每天的信息? 还是您需要整天的数据总和?
如果需要每天的数据,请按表达式在组中添加“ statsdate”。
然后,我认为您不需要进行子查询。 您可以在左联接中将表名放在右边。
如果要每个“关键字ID”的数据,请在结果字段中输入“关键字ID”。 状态不是强制性的,因为始终处于“启用”状态
例:
SELECT
keywordid, statsdate,
SUM( impressions ) AS impressions, SUM( clicks ) AS clicks,
SUM( conversions ) AS conversions, SUM( cost ) AS cost
FROM keyword_stats
LEFT JOIN keywords k USING (keywordid)
WHERE
campaignid = 56486451
AND statsdate BETWEEN '2011-03-01' AND '2011-03-23'
AND k.status = "enabled"
GROUP BY keywordid, statsdate
ORDER BY conversions DESC, clicks DESC, impressions DESC LIMIT 0, 10
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