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SET AUTOCOMMIT = 0
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START TRANSACTION
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SET collation_connection = latin1_general_ci
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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,
`col1` char(01) not null,
`col2` integer unsigned not null,
`col3` char(01) not null,
`col4` char(01) not null
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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insert into `test` (`col1`,`col2`,`col3`,`col4`) values
('A', 1, 'B', 'C'),
('A', 10008, 'B', 'C'),
('A', 50, 'B', 'C'),
('D', 12, 'E', 'F'),
('D', 8815, 'E', 'F'),
('D', 42, 'E', 'F'),
('D', 3, 'E', 'F')
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select * from `test`
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+----+------+-------+------+------+
| id | col1 | col2 | col3 | col4 |
+----+------+-------+------+------+
| 1 | A | 1 | B | C |
| 2 | A | 10008 | B | C |
| 3 | A | 50 | B | C |
| 4 | D | 12 | E | F |
| 5 | D | 8815 | E | F |
| 6 | D | 42 | E | F |
| 7 | D | 3 | E | F |
+----+------+-------+------+------+
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select col1,
concat(min(col2), '; ', max(col2)) as col2,
col3,
col4
from test
group by col1, col3, col4
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+------+----------+------+------+
| col1 | col2 | col3 | col4 |
+------+----------+------+------+
| A | 1; 10008 | B | C |
| D | 3; 8815 | E | F |
+------+----------+------+------+
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COMMIT
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SET AUTOCOMMIT = 1
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