在 MySQL 中创建具有更改日期的数据透视表

Question

所以我正在尝试使用 SQL 查询创建数据透视表。目前我正在做这个过程，但想让它不那么痛苦。

ip    domain      type         date      provider type_of_event number_of_events
999  mail.com    normal      2018-08-31  orange      abuse             12
999  mail1.com    normal     2018-08-30  orange      abuse             11
999  mail1.com    normal     2018-08-29  orange      abuse             13
999  mail.com    normal      2018-08-31  orange      abuse             10

我希望它是这样的

 Domain         2018-08-29  2018-08-30  2018-08-31  Grand Total
mail.com                                 22          22
mail1.com             13        11                   24

我的格式有问题，因为我发现的大多数示例都有固定字段，然后日期总是会发生变化，但我需要它来显示正在处理的当前字段。这将始终以 3 天为增量。我还需要它引用 type_of_event，因为该示例仅显示一种类型，但我在同一个数据库中有多个类型。

这个问题与其他问题不同，因为我没有这些数据来自多个表。所有这些数据都在一个表中。当我没有要加入的内容时，我看不出枢轴加入有什么帮助？

所以使用这个

SELECT CONCAT('SELECT
domain,
SUM(number_of_events * (date_of_event = CURRENT_DATE() - INTERVAL 3 DAY))
  AS `', CURRENT_DATE() - INTERVAL 3 DAY, '`,
SUM(number_of_events * (date_of_event = CURRENT_DATE() - INTERVAL 2 DAY))
  AS `', CURRENT_DATE() - INTERVAL 2 DAY, '`,
SUM(number_of_events * (date_of_event = CURRENT_DATE() - INTERVAL 1 DAY))
  AS `', CURRENT_DATE() - INTERVAL 1 DAY, '`,
SUM(number_of_events) AS `Grand Total`
FROM signal_spam
GROUP BY domain;'
) AS theQuery;

给我

+---------------------------------------------------------------------------- 
----------------------------------------------------------------------------- 
- 
----------------------------------------------------------------------------- 
- 
----------------------------------------------------------------------------- 
- 
----------------------------------------------------------------------------- 
- 
----------------+
| theQuery                                                                                                                                                                                                                                                                                                                                                                                                           
|
+---------------------------------------------------------------------------- 
----------------------------------------------------------------------------- 
- 
------------------------------------------------------------------------------ 
------------------------------------------------------------------------------ 
------------------------------------------------------------------------------ 
----------------+
| SELECT
domain,
SUM(number_of_events * (date_of_event = CURRENT_DATE() - INTERVAL 3 DAY))
  AS `2018-09-11`,
SUM(number_of_events * (date_of_event = CURRENT_DATE() - INTERVAL 2 DAY))
  AS `2018-09-12`,
SUM(number_of_events * (date_of_event = CURRENT_DATE() - INTERVAL 1 DAY))
  AS `2018-09-13`,
SUM(number_of_events) AS `Grand Total`
FROM signal_spam
GROUP BY domain; |
+---------------------------------------------------------------------------- 
----------------------------------------------------------------------------- 
- 
 ---------------------------------------------------------------------------- 
-- 
----------------------------------------------------------------------------- 
- 
----------------------------------------------------------------------------- 
- 
 ----------------+
1 row in set (0.00 sec)

如果我删除 concat，我在行中没有计数，只有总计，也没有列出日期

+------------------------------------+--------------------------------------- 
+---------------------------------------+------------------------------------ 
- 
--+-------------+
| domain                             | ', CURRENT_DATE() - INTERVAL 3 DAY, ' 
| 
', CURRENT_DATE() - INTERVAL 2 DAY, ' | ', CURRENT_DATE() - INTERVAL 1 DAY, ' 
| Grand Total |
+------------------------------------+--------------------------------------- 
+---------------------------------------+------------------------------------ 
- 
--+-------------+
| 0.pool.         |                                     0 
|                                     
0 |                                     0 |         258 |
| 143.com               |                                     0 
|                                     
0 |                                     0 |           2 |

Answer 1

MySQL 中的动态数据透视表通常是通过编写一个查询然后生成一个 SQL 字符串来完成的。

SELECT CONCAT('
  SELECT
    domain,
    SUM(number_of_events * (date = CURRENT_DATE() - INTERVAL 3 DAY))
      AS `', CURRENT_DATE() - INTERVAL 3 DAY, '`,
    SUM(number_of_events * (date = CURRENT_DATE() - INTERVAL 2 DAY))
      AS `', CURRENT_DATE() - INTERVAL 2 DAY, '`,
    SUM(number_of_events * (date = CURRENT_DATE() - INTERVAL 1 DAY))
      AS `', CURRENT_DATE() - INTERVAL 1 DAY, '`,
    SUM(number_of_events) AS `Grand Total`
  FROM tableName
  GROUP BY domain;'
) AS theQuery;

获取该查询的结果，并将其发送回 MySQL。

例如，今天运行该查询会产生：

SELECT
    domain,
    SUM(number_of_events * (date = CURRENT_DATE() - INTERVAL 3 DAY))
      AS `2018-09-11`,
    SUM(number_of_events * (date = CURRENT_DATE() - INTERVAL 2 DAY))
      AS `2018-09-12`,
    SUM(number_of_events * (date = CURRENT_DATE() - INTERVAL 1 DAY))
      AS `2018-09-13`,
    SUM(number_of_events) AS `Grand Total`
  FROM signal_spam
  GROUP BY domain;

有数据透视表查询，由 MySQL 动态生成。现在只需将该查询复制/粘贴回客户端，即可获得最终结果：

+-----------+------------+------------+------------+-------------+
| domain    | 2018-09-11 | 2018-09-12 | 2018-09-13 | Grand Total |
+-----------+------------+------------+------------+-------------+
| mail.com  |          0 |          0 |         22 |          22 |
| mail1.com |         13 |         11 |          0 |          24 |
+-----------+------------+------------+------------+-------------+