MySQL Google 个图表的 AVG 列

Question

因此，对于 google 图表，我需要以下格式的数据：

+--------+---------+---------+---------+
| Month  | Store A | Store B | Store C |
+--------+---------+---------+---------+
| May-19 |     9.5 |     9.4 |     8.8 |
| Jun-19 |     7.9 |     9.4 |     7.2 |
| Jul-19 |       9 |     9.3 |     8.8 |
+--------+---------+---------+---------+

我正在努力格式化我的 SQL 查询来管理它：

    SELECT
    DATE_FORMAT(d.date_submitted,'%b-%y') AS 'Month',
    s.name as 'Store',
    FORMAT(AVG(d.q1),1) AS 'Satisfaction'
    FROM data d
    INNER JOIN store_list s ON d.store_list=s.store_id
    WHERE d.store_list IN (1,2,3)
    GROUP BY store_list, YEAR(d.date_submitted), MONTH(d.date_submitted)
    ORDER BY store_list,YEAR(d.date_submitted) ASC, MONTH(d.date_submitted) ASC

这给了我数据，但布局不对。

+--------+---------+--------------+
| Month  |  Store  | Satisfaction |
+--------+---------+--------------+
| May-19 | Store A |          9.5 |
| Jun-19 | Store A |          7.9 |
| Jul-19 | Store A |            9 |
| May-19 | Store B |          9.4 |
| Jun-19 | Store B |          9.4 |
| Jul-19 | Store B |          9.3 |
| May-19 | Store C |          8.8 |
| Jun-19 | Store C |          7.2 |
| Jul-19 | Store C |          8.8 |
+--------+---------+--------------+

谷歌搜索给了我这个作为一个选项，这是一个布局 google 图表可以使用，但数据完全错误：

    SELECT  
    DATE_FORMAT(date_submitted,'%b-%y') AS 'Month', 
    IF(store_list=1,FORMAT(AVG(q1),1),NULL) AS 'Store A',
    IF(store_list=2,FORMAT(AVG(q1),1),NULL) AS 'Store B',   
    IF(store_list=3,FORMAT(AVG(q1),1),NULL) AS 'Store C'
    FROM data
    GROUP BY YEAR(date_submitted), MONTH(date_submitted)    
    ORDER BY YEAR(date_submitted) ASC, MONTH(date_submitted) ASC

+--------+---------+---------+---------+
| Month  | Store A | Store B | Store C |
+--------+---------+---------+---------+
| NULL   | NULL    | NULL    | NULL    |
| May-19 | 8.8     | NULL    | NULL    |
| Jun-19 | 8.7     | NULL    | NULL    |
| Jul-19 | NULL    | 9.2     | NULL    |
+--------+---------+---------+---------+

我猜测 IF 和 AVG 不能很好地协同工作，但不确定我还能如何将我的数据放入正确的布局中..

[编辑]

对于我目前使用的单个商店：

<?php 
    $sql = "SELECT COUNT(*) as Base, DATE_FORMAT(date_submitted,'%b-%y') AS 'Month', FORMAT(AVG(q1),1) AS 'Satisfaction' FROM data WHERE store_list IN (" . $user_stores . ") GROUP BY YEAR(date_submitted), MONTH(date_submitted) ORDER BY YEAR(date_submitted) ASC, MONTH(date_submitted) ASC";          

    $Sat = mysqli_query($conn,$sql);
    while($row = mysqli_fetch_array($Sat)){
        echo "['".$row['Month']."',".$row['Satisfaction'].",'Satisfaction: ".$row['Satisfaction']."\nBase: ".$row['Base']."'],";
    }
?>

这与我的 Google 图表代码配合得很好，我不太了解 PHP（在 google 上捡到的）所以也许还有另一种方法可以满足MySQL 输出到 Google 图表 - 这样我就可以 return 带有工作代码的数组，然后将该数组按摩到 Google 在 SQL 之外需要的内容？

Answer 1

啊，我的 IF 在 AVG 的外面而不是里面：

SELECT
    DATE_FORMAT(date_submitted,'%b-%y') AS 'Month',
    FORMAT(AVG(CASE WHEN store_list = 1 THEN q1 ELSE NULL END),1) AS 'Store A',
    FORMAT(AVG(CASE WHEN store_list = 2 THEN q1 ELSE NULL END),1) AS 'Store B',
    FORMAT(AVG(CASE WHEN store_list = 3 THEN q1 ELSE NULL END),1) AS 'Store C'
FROM data
WHERE store_list IN (1,2,3)
GROUP BY YEAR(date_submitted), MONTH(date_submitted)
ORDER BY YEAR(date_submitted) ASC, MONTH(date_submitted) ASC

这给了我：

+--------+---------+---------+---------+
| Month  | Store A | Store B | Store C |
+--------+---------+---------+---------+
|May-19  |      9.5|      9.4|      8.8|
|Jun-19  |      7.9|      9.4|      7.2|
|Jul-19  |        9|      9.3|      8.8|
+--------+---------+---------+---------+

现在研究如何做基础并在每个点动态插入相关商店，并为 N 家商店这样做......永无止境 - 希望这对某人有所帮助！

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