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SET AUTOCOMMIT = 0
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--------------
START TRANSACTION
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--------------
DROP DATABASE IF EXISTS `base`
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CREATE DATABASE `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,
`date` date not null,
`cat` integer unsigned not null,
`val` integer unsigned not null
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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insert into `test` (`date`,`cat`,`val`) values
('2017-03-1', 1, 1),
('2017-03-2', 1, 3),
('2017-03-3', 1, 5),
('2017-03-1', 2, 4),
('2017-03-2', 2, 5),
('2017-03-3', 2, 3)
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select * from `test`
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+----+------------+-----+-----+
| id | date | cat | val |
+----+------------+-----+-----+
| 1 | 2017-03-01 | 1 | 1 |
| 2 | 2017-03-02 | 1 | 3 |
| 3 | 2017-03-03 | 1 | 5 |
| 4 | 2017-03-01 | 2 | 4 |
| 5 | 2017-03-02 | 2 | 5 |
| 6 | 2017-03-03 | 2 | 3 |
+----+------------+-----+-----+
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select t1.cat,
t1.date,
sum(t2.val) as val
from test as t1
inner join test as t2
on t2.cat = t1.cat
and t2.date <= t1.date
group by t1.cat, t1.date
order by t1.cat, t1.date
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+-----+------------+------+
| cat | date | val |
+-----+------------+------+
| 1 | 2017-03-01 | 1 |
| 1 | 2017-03-02 | 4 |
| 1 | 2017-03-03 | 9 |
| 2 | 2017-03-01 | 4 |
| 2 | 2017-03-02 | 9 |
| 2 | 2017-03-03 | 12 |
+-----+------------+------+
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COMMIT
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SET AUTOCOMMIT = 1
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