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https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
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42 lines
1.6 KiB
Plaintext
42 lines
1.6 KiB
Plaintext
DROP DATABASE IF EXISTS mcs76_db;
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CREATE DATABASE mcs76_db;
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USE mcs76_db;
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CREATE TABLE t1(col1 INT, col2 TEXT)ENGINE=Columnstore;
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INSERT INTO t1 VALUES(1, repeat('s',20)),(2, repeat('o',20)),(3, 'sss'),(4, 'ooo');
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INSERT INTO t1 SELECT * FROM t1;
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SELECT col2 FROM t1 GROUP BY col2 HAVING col2 LIKE '%o%' ORDER BY col2;
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col2
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ooo
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oooooooooooooooooooo
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SELECT col1 FROM t1 GROUP BY col1 HAVING col1 > 1 ORDER BY col1;
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col1
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2
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3
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4
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SELECT col1, col2 FROM t1 GROUP BY col1, col2 HAVING col1 > 1 AND col2 LIKE '%o%' ORDER BY col1;
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col1 col2
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2 oooooooooooooooooooo
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4 ooo
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SELECT col1, col2 FROM t1 GROUP BY col1, col2 HAVING col1 > 1 OR col2 LIKE '%o%' ORDER BY col1;
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col1 col2
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2 oooooooooooooooooooo
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3 sss
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4 ooo
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SELECT col1, col2, SUM(LENGTH(col2)) FROM t1 GROUP BY col1 HAVING col1 > 1 AND col2 LIKE '%o%' ORDER BY col1;
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ERROR HY000: Internal error: IDB-2021: '`mcs76_db`.`t1`.`col2`' is not in GROUP BY clause. All non-aggregate columns in the SELECT and ORDER BY clause must be included in the GROUP BY clause.
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CREATE TABLE t2(col1 INT, col2 DATETIME)ENGINE=Columnstore;
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INSERT INTO t2 VALUES(1, '2020-2-2'),(2, '2020-3-3'),(5,'2020-6-6'),(6, '2020-7-7');
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SELECT t1.col1, SUM(t1.col1*t2.col1) AS a FROM t1 JOIN t2 ON t1.col1 = t2.col1 GROUP BY t1.col1 HAVING a>1 ORDER BY t1.col1;
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col1 a
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1 2
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2 8
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SELECT t1.col1, SUM(t1.col1*t2.col1) AS a FROM t1 LEFT JOIN t2 ON t1.col1 = t2.col1 GROUP BY t1.col1 HAVING a>1 ORDER BY t1.col1;
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col1 a
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1 2
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2 8
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SELECT t1.col1, SUM(t1.col1*t2.col1) AS a FROM t1 RIGHT JOIN t2 ON t1.col1 = t2.col1 GROUP BY t1.col1 HAVING a>1 ORDER BY t1.col1;
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col1 a
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1 2
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2 8
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DROP DATABASE mcs76_db;
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