仅检索范围之间每个组的最后一条记录

Question

我的table是

+-------+----------------+---------+--------------+-------------------+
|  id   | invoice_number | user_id | created_date | next_contact_date |
+-------+----------------+---------+--------------+-------------------+
| 42699 |            100 |     236 | 2021-05-19   | 2022-08-09        |
| 42693 |            100 |     236 | 2021-03-01   | 2022-08-09        |
| 42694 |            100 |      30 | 2021-03-01   | 2022-08-08        |
| 42695 |            100 |     235 | 2021-03-03   | 2022-08-09        |
| 42696 |            100 |      30 | 2021-05-01   | 2022-08-02        |
| 42697 |            100 |     235 | 2021-05-03   | 2022-08-04        |
| 42698 |            100 |     236 | 2021-05-04   | 2022-08-02        |
| 42700 |            100 |      30 | 2021-05-19   | 2022-08-08        |
| 42701 |            100 |     235 | 2021-05-20   | 2022-08-08        |
| 42702 |            100 |     236 | 2021-05-19   | 2022-08-09        |
+-------+----------------+---------+--------------+-------------------+

我想根据每个 user_id 组的 id 检索最后一条记录，但前提是它在 next_contact_date 范围

之间

期望输出

如果用户选择检索 2022-08-01 和 2022-08-15 之间的记录应该是

+-------+----------------+---------+--------------+-------------------+
|  id   | invoice_number | user_id | created_date | next_contact_date |
+-------+----------------+---------+--------------+-------------------+
| 42700 |            100 |      30 | 2021-05-19   | 2022-08-08        |
| 42701 |            100 |     235 | 2021-05-20   | 2022-08-08        |
| 42702 |            100 |     236 | 2021-05-19   | 2022-08-09        |
+-------+----------------+---------+--------------+-------------------+

效果很好!!!!

如果现在用户选择检索 2022-08-01 和 2022-08-05 之间的记录，它应该是空的，因为最后每个 user_id 组的 id 不在 next_contact_date.

内

我试过的

SELECT * FROM mytable WHERE id IN 
                    (SELECT MAX(id) AS id FROM mytable where mytable.next_contact_date BETWEEN '2022-08-01' AND '2022-08-05 23:59:59.999' GROUP BY user_id)

我得到下面的结果，这不是我的 want.The 结果应该是空的，因为最后的记录不属于用户指定的 next_contact_date 范围。

+-------+----------------+---------+-----------------+-------------------+
|  id   | invoice_number | user_id |    created_date | next_contact_date |
+-------+----------------+---------+-----------------+-------------------+
| 42696 |            100 |      30 | 2021-05-01      | 2022-08-02        |
| 42697 |            100 |     235 | 2021-05-03      | 2022-08-04        |
| 42698 |            100 |     236 | 2021-05-04      | 2022-08-02        |
+-------+----------------+---------+-----------------+-------------------+

Answer 1

您需要进一步的子查询来捕获所有 user_id，即在该时间范围内选择的。

并使用 user_ids 获取最后的 ID，但仅选择时间范围内的行

CREATE TABLE mytable
    (`id` int, `invoice_number` int, `user_id` int, `created_date` date, `next_contact_date` date)
;
    
INSERT INTO mytable
    (`id`, `invoice_number`, `user_id`, `created_date`, `next_contact_date`)
VALUES
    (42699, 100, 236, '2021-05-19', '2022-08-09'),
    (42693, 100, 236, '2021-03-01', '2022-08-09'),
    (42694, 100, 30, '2021-03-01', '2022-08-08'),
    (42695, 100, 235, '2021-03-03', '2022-08-09'),
    (42696, 100, 30, '2021-05-01', '2022-08-02'),
    (42697, 100, 235, '2021-05-03', '2022-08-04'),
    (42698, 100, 236, '2021-05-04', '2022-08-02'),
    (42700, 100, 30, '2021-05-19', '2022-08-08'),
    (42701, 100, 235, '2021-05-20', '2022-08-08'),
    (42702, 100, 236, '2021-05-19', '2022-08-09')
;

SELECT * FROM mytable WHERE id IN 
                    (SELECT MAX(id) AS id FROM mytable 
                    where `user_id` IN 
                    (SELECT `user_id` FROM mytable WHERE mytable.next_contact_date BETWEEN '2022-08-01' AND '2022-08-05 23:59:59.999')
                    GROUP BY user_id)
AND mytable.next_contact_date BETWEEN '2022-08-01' AND '2022-08-05 23:59:59.999'

id | invoice_number | user_id | created_date | next_contact_date
-: | -------------: | ------: | :----------- | :----------------

SELECT * FROM mytable WHERE id IN 
                    (SELECT MAX(id) AS id FROM mytable 
                    where `user_id` IN 
                    (SELECT `user_id` FROM mytable 
                    WHERE mytable.next_contact_date BETWEEN '2022-08-01' AND '2022-08-15 23:59:59.999')
                    GROUP BY user_id)
AND mytable.next_contact_date BETWEEN '2022-08-01' AND '2022-08-15 23:59:59.999'

   id | invoice_number | user_id | created_date | next_contact_date
----: | -------------: | ------: | :----------- | :----------------
42700 |            100 |      30 | 2021-05-19   | 2022-08-08       
42701 |            100 |     235 | 2021-05-20   | 2022-08-08       
42702 |            100 |     236 | 2021-05-19   | 2022-08-09

db<>fiddle here

仅检索范围之间每个组的最后一条记录

Retrieve only last record of each group between range

mysql

group-by

inner-join