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START TRANSACTION
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DROP DATABASE IF EXISTS `base`
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CREATE DATABASE IF NOT EXISTS `base`
DEFAULT CHARACTER SET `latin1`
DEFAULT COLLATE `latin1_general_ci`
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DROP TABLE IF EXISTS `test`
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CREATE TABLE `test`
( `id` integer unsigned NOT NULL AUTO_INCREMENT primary key,
`article` char(05) NOT NULL,
`date` date NOT NULL
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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insert into `test` (`article`,`date`) values
('art11', '2021-01-05'),
('art11', '2021-07-06'),
('art11', '2021-03-15'),
('art11', '2021-04-11'),
('art11', '2021-05-17'),
('art11', '2021-03-21'),
('art22', '2021-03-02'),
('art22', '2021-01-07'),
('art22', '2021-06-21'),
('art22', '2021-04-02'),
('art22', '2021-07-02'),
('art22', '2021-06-19'),
('art33', '2021-07-02'),
('art33', '2021-01-29'),
('art33', '2021-06-23'),
('art33', '2021-04-12'),
('art33', '2021-07-05'),
('art33', '2021-04-16'),
('art33', '2021-03-03'),
('art44', '2021-01-05'),
('art44', '2021-04-09'),
('art44', '2021-06-05'),
('art44', '2021-05-14'),
('art44', '2021-07-06'),
('art44', '2021-01-05'),
('art44', '2021-02-06')
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select * from `test`
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+----+---------+------------+
| id | article | date |
+----+---------+------------+
| 1 | art11 | 2021-01-05 |
| 2 | art11 | 2021-07-06 |
| 3 | art11 | 2021-03-15 |
| 4 | art11 | 2021-04-11 |
| 5 | art11 | 2021-05-17 |
| 6 | art11 | 2021-03-21 |
| 7 | art22 | 2021-03-02 |
| 8 | art22 | 2021-01-07 |
| 9 | art22 | 2021-06-21 |
| 10 | art22 | 2021-04-02 |
| 11 | art22 | 2021-07-02 |
| 12 | art22 | 2021-06-19 |
| 13 | art33 | 2021-07-02 |
| 14 | art33 | 2021-01-29 |
| 15 | art33 | 2021-06-23 |
| 16 | art33 | 2021-04-12 |
| 17 | art33 | 2021-07-05 |
| 18 | art33 | 2021-04-16 |
| 19 | art33 | 2021-03-03 |
| 20 | art44 | 2021-01-05 |
| 21 | art44 | 2021-04-09 |
| 22 | art44 | 2021-06-05 |
| 23 | art44 | 2021-05-14 |
| 24 | art44 | 2021-07-06 |
| 25 | art44 | 2021-01-05 |
| 26 | art44 | 2021-02-06 |
+----+---------+------------+
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select article,
date
from ( select t1.article,
t1.date,
count(t1.date) as rang
from `test` as t1
left outer join `test` as t2
on t2.article = t1.article
and t2.date >= t1.date
group by t1.article,t1.date
order by t1.article,t1.date
) as x
where rang <=3
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+---------+------------+
| article | date |
+---------+------------+
| art11 | 2021-04-11 |
| art11 | 2021-05-17 |
| art11 | 2021-07-06 |
| art22 | 2021-06-19 |
| art22 | 2021-06-21 |
| art22 | 2021-07-02 |
| art33 | 2021-06-23 |
| art33 | 2021-07-02 |
| art33 | 2021-07-05 |
| art44 | 2021-05-14 |
| art44 | 2021-06-05 |
| art44 | 2021-07-06 |
+---------+------------+
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COMMIT
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