DROP DATABASE IF EXISTS mcs76_db;
CREATE DATABASE mcs76_db;
USE mcs76_db;
CREATE TABLE t1(col1 INT, col2 TEXT)ENGINE=Columnstore;
INSERT INTO t1 VALUES(1, repeat('s',20)),(2, repeat('o',20)),(3, 'sss'),(4, 'ooo');
INSERT INTO t1 SELECT * FROM t1;
SELECT col2 FROM t1 GROUP BY col2 HAVING col2 LIKE '%o%' ORDER BY col2;
col2
ooo
oooooooooooooooooooo
SELECT col1 FROM t1 GROUP BY col1 HAVING col1 > 1 ORDER BY col1;
col1
2
3
4
SELECT col1, col2 FROM t1 GROUP BY col1, col2 HAVING col1 > 1 AND col2 LIKE '%o%' ORDER BY col1;
col1	col2
2	oooooooooooooooooooo
4	ooo
SELECT col1, col2 FROM t1 GROUP BY col1, col2 HAVING col1 > 1 OR col2 LIKE '%o%' ORDER BY col1;
col1	col2
2	oooooooooooooooooooo
3	sss
4	ooo
SELECT col1, col2, SUM(LENGTH(col2)) FROM t1 GROUP BY col1 HAVING col1 > 1 AND col2 LIKE '%o%' ORDER BY col1;
col1	col2	SUM(LENGTH(col2))
2	oooooooooooooooooooo	40
4	ooo	6
SELECT 'some output';
some output
some output
CREATE TABLE t2(col1 INT, col2 DATETIME)ENGINE=Columnstore;
INSERT INTO t2 VALUES(1, '2020-2-2'),(2, '2020-3-3'),(5,'2020-6-6'),(6, '2020-7-7');
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;
col1	a
1	2
2	8
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;
col1	a
1	2
2	8
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;
col1	a
1	2
2	8
DROP DATABASE mcs76_db;