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25 lines
967 B
Plaintext
25 lines
967 B
Plaintext
DROP DATABASE IF EXISTS mcs97_db;
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CREATE DATABASE mcs97_db;
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USE mcs97_db;
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CREATE TABLE t1 (a INT, b CHAR(5))ENGINE=Columnstore;
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INSERT INTO t1 VALUES (NULL, NULL),(1, 'aaa'),(2, 'aaa'),(3, 'ccc'),(4, 'ddd'),(5, 'aaa'),(6, 'ddd'),(7, 'eee');
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SELECT GROUP_CONCAT(a ORDER BY a) FROM t1;
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GROUP_CONCAT(a ORDER BY a)
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1,2,3,4,5,6,7
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SELECT GROUP_CONCAT(a ORDER BY a DESC SEPARATOR ';') FROM t1;
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GROUP_CONCAT(a ORDER BY a DESC SEPARATOR ';')
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7;6;5;4;3;2;1
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SELECT GROUP_CONCAT(a ORDER BY a DESC SEPARATOR ';') FROM t1;
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GROUP_CONCAT(a ORDER BY a DESC SEPARATOR ';')
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7;6;5;4;3;2;1
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SELECT GROUP_CONCAT(b ORDER BY b) FROM t1;
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GROUP_CONCAT(b ORDER BY b)
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aaa,aaa,aaa,ccc,ddd,ddd,eee
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SELECT GROUP_CONCAT(DISTINCT b ORDER BY b ASC SEPARATOR ';') FROM t1;
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GROUP_CONCAT(DISTINCT b ORDER BY b ASC SEPARATOR ';')
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aaa;ccc;ddd;eee
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SELECT GROUP_CONCAT(b ORDER BY b DESC SEPARATOR ';') FROM t1;
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GROUP_CONCAT(b ORDER BY b DESC SEPARATOR ';')
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eee;ddd;ddd;ccc;aaa;aaa;aaa
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DROP DATABASE mcs97_db;
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